should the warm BPMs in LHC be coated with a 100 micron copper layer? (question by Gerhard Schneider)
|
|
- Moris Sharp
- 5 years ago
- Views:
Transcription
1 shoud the warm BPMs in LHC be coated with a micron copper ayer? (question by Gerhard Schneider) 46 BPMs per beam (6 BPMSW, 8 BPMW, 4 BPMWA, 8 BPMWB) Average beta Injection Top Horizonta beta Vertica beta 9.9 m 5. m 38. m 36.5 m Each BPM is 85 mm ong. The inner bore radius b is typicay 3 mm. The thickness d is mm stainess stee. The tota ength is 3. m. I assume a stainess stee conductivity of σ=.4x 6 Ω - m -, which might however increase with temperature, if the beam pipe heats up. Skin depth of copper is.7 mm at 8 khz, and 5 µm at MHz. st response by Francesco: a Cu coating is wecome to reduce beam induced ohmic heating and resistive wa impedance at very ow frequency (down to ~ khz), but a thin coating is not very effective at room temperature, where you need a Cu thickness in the mm range to shied the outer SS. I have aso the foowing two naive remarks: - the Cu coating shoud remain compatibe with the BPM functionaity, - the Cu coating may be counter-productive in case of resonant modes with a Q-factor that woud be enhanced by such a ow resistivity coating.
2 resistive wa impedance π π ρ π ) sgn( L i L i b c c b i t = = CERN formua (L. Vos, E. Metra) inductive bypass ony active in the transverse pane; derivation uncear, independent of chamber thickness ( ) ( ) )) sgn( ( tanh tanh σ µ π i d b b d b b i t = = FNAL formua (Burov, Lebedev) soution of Maxwe s equation; chamber thickness enters; Burov/Lebedev s resut agrees with formua in otter/kheifets book in some cases and extends it in many others
3 Burov and Lebedev aso give a resut for -ayer chamber, where inner ayer, e.g., d= micron copper, is surrounded by another materia, e.g., by an infinite amount of stainess stee t, = i πb + + b + = ( i sgn( )) µ σ, tanh ( d) + b tanh ( d)
4 Normaize the beta function to 7 m. Use definition of the transverse effective impedance of LHC Design Report. Effective ongitudina transverse impedance is obtained by integration over the bunch spectrum. uncoated (ong/n)eff (Ω).6 (injection). (top) (ong/n)eff (Ω).38 (injection).5 (top) eff [8 khz] (MΩ/m) i (injection) i (top energy) factor ~ difference! eff [8 khz] (MΩ/m).83-. i (injection) I (top energy) eff [ MHz] (MΩ/m).-. i (injection).4-.4 i (top) eff [ MHz] (MΩ/m).4-.4 i (injection).3-.3 i (top) L. Vos Burov/ Lebedev tota impedance from design report (sign probem) (ong/n)eff (Ω).7.76 eff [8 khz] (MΩ/m) -45- i (injection) -9-4 i (top energy) eff [ MHz] (MΩ/m) -3-9 i (injection) -5-5 i (top) for ongit. impedance I assumed the standard resistive-wa reation = t ( b /( c). Resistive-wa contribution from the BPMs is ess than % of the tota. for a coated chamber (σ=5.9x 7 Ω - m - ) I find from Burov/Lebedev (ong/n)eff (Ω).34 (injection).8 (top) eff [8 khz] (MΩ/m) i (injection) i (top energy) eff [ MHz] (MΩ/m).-. i (injection).-. i (top)
5 concusion on BPMs different formuae give resuts that differ by a factor even in the worst case the tota impedance for the uncoated BPMs is % or ess of the tota LHC impedance Fritz tes me that none of the formuae can be trusted since the rea probem is 3-dimensiona he recommends cacuation with HFSS nevertheess -dim. estimates shoud give an upper bound at ~khz frequencies my tentative concusion is that no coating woud be needed
6 Touschek modue in MADX C. Miardi, F. Schmidt, F. immermann impemented genera formua from Piwinski (Chao-Tigner handbook) impementation faciitated by simiarities with IBS modue new modue wi give growth rate for each beamine eement bunch ength and energy spread are at the moment frozen around the ring (not a good approximation for strong rf focusing at DAFNE)
7 atest e-coud predictions for LHC: heat oad vs deta_max for nomina bunch popuation at injection and top energy
8 e-coud in DAFNE news from Mikhai obov: Last year DAFNE was substantiay changed: modified wiggers, two new interaction regions, some optics modifications etc. Now we can observe a strong horizonta instabiity which have many features that can be attributed to e-coud: ) ampitude of horizonta osciations grows aong the train; ) the betatron ine is spitted in severa ines... On the other hand, the same behaviour is observed for the e- ring, but at much higher currents and threshods. But in case of e-ring, it can be due to the horizonta ion instabiity ike that at KEKB. Yet another observation - different tune shifts versus mutibunch currents in e- and e+ rings. It seems that in the e+ring there is some additiona positive tune shift in both transverse panes...
9 Mikhai s news cont d. Now we have a possibiity to measure betatron ampitudes turn-by-turn on the bunch-bybunch basis. What you can see is grow-damp measurements: for a very short time we switched off the transverse feedback and ook at the ampitudes. In the shown exampe there were 9 bunches + 3 bunch gap.. Tune shift measurements were performed in singe bunch and mutibunch regimes in October (for DEAR experiment) and in January 4 (for FINUDA experiment). Summarizing: a) Singe bunch -- tunes shift is negigibe for both rings; b) Mutibunch -- tune shifts have opposite sign sopes and can be cacuated anayticay for e- ring (strong asymmetry due to wigger vacuum chamber) c) In the e+ ring -- the vertica tune shift is amost zero, but the horizonta one is positive and by a factor of higher with respect to the e-ring (Oct. ) and amost by a factor of 4 higher now (January). Respectivey, the instabiity threshod is by a factor of ower now. Cure: certainy, beam-beam. Yet another strange thing - the instabiity threshod grows from 5 ma to A by changind the RF frequence by - khz (dispersive orbit?, impedance? Energy?) (the orbit changes by 3 mm at maximum inside the wigger vacuum chambers having sizes 3 x cm. No (sight) tune changes, no chromaticity changes. No noninearity changes - we have measured the decoherence at different RF frequencies).
10 9 consecutive bunches + bucket gap Bunches 5, 5, 7, 9 Bunches at the train end:75, 8, 85,9
11 Tune Shifts of Bunch Trains due to Resistive Was without Circuar Symmetry PRSTAB,5, () (Chao, Heifets, otter) dq x, y di π = ± R L b + 48Qx, y E / e b C d b - horizonta vacuum chamber size; d - vertica vacuum chamber size; L vacuum chamber ength; R machine radius; 376 Ω; DAΦNE, Oct. Qx, n e-, Qx, Qy, bunches I, ma Qy, on dq, y di x = ±.4/ A Good agreement with experimenta data!!
12 Tune Shift Measurements in e+ Ring (important not ony for the instabiity, but aso for beam-beam coisions!) Qx Horizonta tune e+ bunches Qx, on Qx, on Qx, off Qx, off I, ma f, khz - Factor of instabiity threshod increase Qx (SB) Qx 5 ma. 7.8 Qx DAΦNE, Oct. DAΦNE, //4
(Refer Slide Time: 2:34) L C V
Microwave Integrated Circuits Professor Jayanta Mukherjee Department of Eectrica Engineering Indian Intitute of Technoogy Bombay Modue 1 Lecture No 2 Refection Coefficient, SWR, Smith Chart. Heo wecome
More informationAPPENDIX C FLEXING OF LENGTH BARS
Fexing of ength bars 83 APPENDIX C FLEXING OF LENGTH BARS C.1 FLEXING OF A LENGTH BAR DUE TO ITS OWN WEIGHT Any object ying in a horizonta pane wi sag under its own weight uness it is infinitey stiff or
More information3.10 Implications of Redundancy
118 IB Structures 2008-9 3.10 Impications of Redundancy An important aspect of redundant structures is that it is possibe to have interna forces within the structure, with no externa oading being appied.
More informationDYNAMIC RESPONSE OF CIRCULAR FOOTINGS ON SATURATED POROELASTIC HALFSPACE
3 th Word Conference on Earthquake Engineering Vancouver, B.C., Canada August -6, 4 Paper No. 38 DYNAMIC RESPONSE OF CIRCULAR FOOTINGS ON SATURATED POROELASTIC HALFSPACE Bo JIN SUMMARY The dynamic responses
More informationSeparation of Variables and a Spherical Shell with Surface Charge
Separation of Variabes and a Spherica She with Surface Charge In cass we worked out the eectrostatic potentia due to a spherica she of radius R with a surface charge density σθ = σ cos θ. This cacuation
More informationEECS 117 Homework Assignment 3 Spring ω ω. ω ω. ω ω. Using the values of the inductance and capacitance, the length of 2 cm corresponds 1.5π.
EES 7 Homework Assignment Sprg 4. Suppose the resonant frequency is equa to ( -.5. The oad impedance is If, is equa to ( ( The ast equaity hods because ( -.5. Furthermore, ( Usg the vaues of the ductance
More informationTRANSVERSE IMPEDANCE OF LHC COLLIMATORS
Contributed talk WEOAC03 (12 + 3 min, 14 slides) TRANSVERSE IMPEDANCE OF LHC COLLIMATORS Elias Métral Work in collaboration with G. Arduini,, R. Assmann,, A. Boccardi,, T. Bohl, F. Caspers,, M. Gasior,,
More informationBEAM SCREEN ISSUES (with 20 T dipole magnets instead of 8.3 T)
BEAM SCREEN ISSUES (with 20 T dipole magnets instead of 8.3 T) Introduction and current LHC beam screen Magneto-Resistance (MR) What was done in the past (approx. of the approx. Kohler s rule) Exact and
More informationFirst-Order Corrections to Gutzwiller s Trace Formula for Systems with Discrete Symmetries
c 26 Noninear Phenomena in Compex Systems First-Order Corrections to Gutzwier s Trace Formua for Systems with Discrete Symmetries Hoger Cartarius, Jörg Main, and Günter Wunner Institut für Theoretische
More informationCandidate Number. General Certificate of Education Advanced Level Examination January 2012
entre Number andidate Number Surname Other Names andidate Signature Genera ertificate of Education dvanced Leve Examination January 212 Physics PHY4/1 Unit 4 Fieds and Further Mechanics Section Tuesday
More informationSimulation of transverse multi-bunch instabilities of proton beams in LHC
Simulation of transverse multi-bunch instabilities of proton beams in LHC Alexander Koschik Technische Universität Graz, Austria & CERN Geneva, Switzerland TU Graz supervisor: CERN supervisors: B. Schnizer
More informationEstimates of local heating due to trapped modes in vacuum chamber
Estimates of local heating due to trapped modes in vacuum chamber Gennady Stupakov SLAC National Accelerator Laboratory, Menlo Park, CA 94025 CERN, April 29, 2016 2 Motivation The motivation for this analysis
More informationComputer class: Linear Optics in JLAB: Longitudinal Dynamics and BBU
USPAS course on Recircuated and Energy Recovered Linacs Ivan Bazarov, Corne University Geoff Krafft and Dave Dougas, JLAB Computer cass: Linear Optics in JLAB: Longitudina Dynamics and BBU JLAB IRFEL Spreadsheet
More informationThe TESLA Dogbone Damping Ring
The TESLA Dogbone Damping Ring Winfried Decking for the TESLA Collaboration April 6 th 2004 Outline The Dogbone Issues: Kicker Design Dynamic Aperture Emittance Dilution due to Stray-Fields Collective
More informationTHE OUT-OF-PLANE BEHAVIOUR OF SPREAD-TOW FABRICS
ECCM6-6 TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, Sevie, Spain, -6 June 04 THE OUT-OF-PLANE BEHAVIOUR OF SPREAD-TOW FABRICS M. Wysocki a,b*, M. Szpieg a, P. Heström a and F. Ohsson c a Swerea SICOMP
More informationSome Measures for Asymmetry of Distributions
Some Measures for Asymmetry of Distributions Georgi N. Boshnakov First version: 31 January 2006 Research Report No. 5, 2006, Probabiity and Statistics Group Schoo of Mathematics, The University of Manchester
More informationLecture 6: Moderately Large Deflection Theory of Beams
Structura Mechanics 2.8 Lecture 6 Semester Yr Lecture 6: Moderatey Large Defection Theory of Beams 6.1 Genera Formuation Compare to the cassica theory of beams with infinitesima deformation, the moderatey
More informationUSPAS Course on Recirculated and Energy Recovered Linacs
USPAS Course on Recircuated and Energy Recovered Linacs I. V. Bazarov Corne University D.R. Dougas, G. A. Krafft, and L. Merminga Jefferson Lab Computer Cass: Linear Optics in JLAB IRFEL, Longitudina gymnastics,
More informationProblem Set 6: Solutions
University of Aabama Department of Physics and Astronomy PH 102 / LeCair Summer II 2010 Probem Set 6: Soutions 1. A conducting rectanguar oop of mass M, resistance R, and dimensions w by fas from rest
More informationTechnical Data for Profiles. Groove position, external dimensions and modular dimensions
Technica Data for Profies Extruded Profie Symbo A Mg Si 0.5 F 25 Materia number.206.72 Status: artificiay aged Mechanica vaues (appy ony in pressing direction) Tensie strength Rm min. 245 N/mm 2 Yied point
More informationPhysics 235 Chapter 8. Chapter 8 Central-Force Motion
Physics 35 Chapter 8 Chapter 8 Centra-Force Motion In this Chapter we wi use the theory we have discussed in Chapter 6 and 7 and appy it to very important probems in physics, in which we study the motion
More informationTHE THREE POINT STEINER PROBLEM ON THE FLAT TORUS: THE MINIMAL LUNE CASE
THE THREE POINT STEINER PROBLEM ON THE FLAT TORUS: THE MINIMAL LUNE CASE KATIE L. MAY AND MELISSA A. MITCHELL Abstract. We show how to identify the minima path network connecting three fixed points on
More informationSelf Inductance of a Solenoid with a Permanent-Magnet Core
1 Probem Sef Inductance of a Soenoid with a Permanent-Magnet Core Kirk T. McDonad Joseph Henry Laboratories, Princeton University, Princeton, NJ 08544 (March 3, 2013; updated October 19, 2018) Deduce the
More informationLecture 9. Stability of Elastic Structures. Lecture 10. Advanced Topic in Column Buckling
Lecture 9 Stabiity of Eastic Structures Lecture 1 Advanced Topic in Coumn Bucking robem 9-1: A camped-free coumn is oaded at its tip by a oad. The issue here is to find the itica bucking oad. a) Suggest
More informationRelated Topics Maxwell s equations, electrical eddy field, magnetic field of coils, coil, magnetic flux, induced voltage
Magnetic induction TEP Reated Topics Maxwe s equations, eectrica eddy fied, magnetic fied of cois, coi, magnetic fux, induced votage Principe A magnetic fied of variabe frequency and varying strength is
More information12.2. Maxima and Minima. Introduction. Prerequisites. Learning Outcomes
Maima and Minima 1. Introduction In this Section we anayse curves in the oca neighbourhood of a stationary point and, from this anaysis, deduce necessary conditions satisfied by oca maima and oca minima.
More informationUnconditional security of differential phase shift quantum key distribution
Unconditiona security of differentia phase shift quantum key distribution Kai Wen, Yoshihisa Yamamoto Ginzton Lab and Dept of Eectrica Engineering Stanford University Basic idea of DPS-QKD Protoco. Aice
More informationPHYS 110B - HW #1 Fall 2005, Solutions by David Pace Equations referenced as Eq. # are from Griffiths Problem statements are paraphrased
PHYS 110B - HW #1 Fa 2005, Soutions by David Pace Equations referenced as Eq. # are from Griffiths Probem statements are paraphrased [1.] Probem 6.8 from Griffiths A ong cyinder has radius R and a magnetization
More informationLongitudinal Issues for a Full-Scale ERL. Topics for discussion
Longitudina Issues for a Fu-Scae ERL Topics for discussion first- and second-order correation in ongitudina phase space requirements for momentum compaction of the ring attice options second-order momentum
More informationMeasurement of acceleration due to gravity (g) by a compound pendulum
Measurement of acceeration due to gravity (g) by a compound penduum Aim: (i) To determine the acceeration due to gravity (g) by means of a compound penduum. (ii) To determine radius of gyration about an
More informationLECTURE 10. The world of pendula
LECTURE 0 The word of pendua For the next few ectures we are going to ook at the word of the pane penduum (Figure 0.). In a previous probem set we showed that we coud use the Euer- Lagrange method to derive
More informationIII. CesrTA Configuration and Optics for Ultra-Low Emittance David Rice Cornell Laboratory for Accelerator-Based Sciences and Education
III. CesrTA Configuration and Optics for Ultra-Low Emittance David Rice Cornell Laboratory for Accelerator-Based Sciences and Education Introduction Outline CESR Overview CESR Layout Injector Wigglers
More informationThomX Machine Advisory Committee. (LAL Orsay, March ) Ring Beam Dynamics
ThomX Machine Advisory Committee (LAL Orsay, March 20-21 2017) Ring Beam Dynamics A. Loulergue, M. Biagini, C. Bruni, I. Chaikovska I. Debrot, N. Delerue, A. Gamelin, H. Guler, J. Zang Programme Investissements
More informationSection 6: Magnetostatics
agnetic fieds in matter Section 6: agnetostatics In the previous sections we assumed that the current density J is a known function of coordinates. In the presence of matter this is not aways true. The
More informationFirst Collective Effects Measurements in NSLS-II A. Blednykh Accelerator Physicist, BNL/NSLS-II Sep , 2014
First Collective Effects Measurements in NSLS-II A. Blednykh Accelerator Physicist, BNL/NSLS-II Sep. 17-19, 2014 (LOWεRING 2014) 1 BROOKHAVEN SCIENCE ASSOCIATES Outline Phase 1 (25mA / PETRA-III) and Phase
More informationInstabilities Part III: Transverse wake fields impact on beam dynamics
Instabilities Part III: Transverse wake fields impact on beam dynamics Giovanni Rumolo and Kevin Li 08/09/2017 Beam Instabilities III - Giovanni Rumolo and Kevin Li 2 Outline We will close in into the
More informationNonlinear Analysis of Spatial Trusses
Noninear Anaysis of Spatia Trusses João Barrigó October 14 Abstract The present work addresses the noninear behavior of space trusses A formuation for geometrica noninear anaysis is presented, which incudes
More informationQuantum Mechanical Models of Vibration and Rotation of Molecules Chapter 18
Quantum Mechanica Modes of Vibration and Rotation of Moecues Chapter 18 Moecuar Energy Transationa Vibrationa Rotationa Eectronic Moecuar Motions Vibrations of Moecues: Mode approximates moecues to atoms
More informationTHINKING IN PYRAMIDS
ECS 178 Course Notes THINKING IN PYRAMIDS Kenneth I. Joy Institute for Data Anaysis and Visuaization Department of Computer Science University of Caifornia, Davis Overview It is frequenty usefu to think
More informationImpedance & Instabilities
Impedance & Instabilities The concept of wakefields and impedance Wakefield effects and their relation to important beam parameters Beam-pipe geometry and materials and their impact on impedance An introduction
More informationSECTION A. Question 1
SECTION A Question 1 (a) In the usua notation derive the governing differentia equation of motion in free vibration for the singe degree of freedom system shown in Figure Q1(a) by using Newton's second
More informationImpedance and Collective Effects in Future Light Sources. Karl Bane FLS2010 Workshop 1 March 2010
Impedance and Collective Effects in Future Light Sources Karl Bane FLS2010 Workshop 1 March 2010 In future ring-based light sources, the combination of low emittance and high current will mean that collective
More informationElectron Cloud Studies
Electron Cloud Studies Tom Kroyer, Edgar Mahner,, Fritz Caspers, CERN LHC MAC, 7. December 2007 Agenda Introduction to electron cloud effects Overview over possible remedies surface coatings rough surfaces
More informationSession : Electrodynamic Tethers
Session : Eectrodynaic Tethers Eectrodynaic tethers are ong, thin conductive wires depoyed in space that can be used to generate power by reoving kinetic energy fro their orbita otion, or to produce thrust
More informationGeneral wall impedance theory for 2D axisymmetric and flat multilayer structures
General wall impedance theory for 2D axisymmetric and flat multilayer structures N. Mounet and E. Métral Acknowledgements: N. Biancacci, F. Caspers, A. Koschik, G. Rumolo, B. Salvant, B. Zotter. N. Mounet
More information1) For a block of mass m to slide without friction up a rise of height h, the minimum initial speed of the block must be
v m 1) For a bock of mass m to side without friction up a rise of height h, the minimum initia speed of the bock must be a ) gh b ) gh d ) gh e ) gh c ) gh P h b 3 15 ft 3) A man pus a pound crate up a
More informationEmittance Growth and Tune Spectra at PETRA III
Emittance Growth and Tune Spectra at PETRA III Presentation at the ECLOUD 2010 workshop Rainer Wanzenberg ECLOUD 2010 October 8-12, 2010 Statler Hotel, Cornell University Ithaca, New York USA PETRA III
More informationPHYSICS LOCUS / / d dt. ( vi) mass, m moment of inertia, I. ( ix) linear momentum, p Angular momentum, l p mv l I
6 n terms of moment of inertia, equation (7.8) can be written as The vector form of the above equation is...(7.9 a)...(7.9 b) The anguar acceeration produced is aong the direction of appied externa torque.
More informationUltrasonic Measurements of Kinematic Viscosity for Analize of Engine Oil Parameters
th European Conference on Non-Destructive Testing (ECNDT 04), October 6-0, 04, Prague, Czech Repubic More Info at Open Access Database www.ndt.net/?id=6344 Utrasonic Measurements of Kinematic Viscosity
More informationLecture Notes for Math 251: ODE and PDE. Lecture 34: 10.7 Wave Equation and Vibrations of an Elastic String
ecture Notes for Math 251: ODE and PDE. ecture 3: 1.7 Wave Equation and Vibrations of an Eastic String Shawn D. Ryan Spring 212 ast Time: We studied other Heat Equation probems with various other boundary
More informationCHAPTER 4 STRESS AND STRAIN
CHPTER STRESS ND STRIN EXERCISE, Page 95. If a oid tone i dropped into the ea and come to ret at a depth of 5000 m beow the urface of the ea, what wi be the tre in the tone? Take the denity of eawater
More information1. Measurements and error calculus
EV 1 Measurements and error cacuus 11 Introduction The goa of this aboratory course is to introduce the notions of carrying out an experiment, acquiring and writing up the data, and finay anayzing the
More informationSimplified analysis of EXAFS data and determination of bond lengths
Indian Journa of Pure & Appied Physics Vo. 49, January 0, pp. 5-9 Simpified anaysis of EXAFS data and determination of bond engths A Mishra, N Parsai & B D Shrivastava * Schoo of Physics, Devi Ahiya University,
More informationCE601-Structura Anaysis I UNIT-IV SOPE-DEFECTION METHOD 1. What are the assumptions made in sope-defection method? (i) Between each pair of the supports the beam section is constant. (ii) The joint in
More informationSimulations of single bunch collective effects using HEADTAIL
Simulations of single bunch collective effects using HEADTAIL G. Rumolo, in collaboration with E. Benedetto, O. Boine-Frankenheim, G. Franchetti, E. Métral, F. Zimmermann ICAP, Chamonix, 02.10.2006 Giovanni
More informationForces of Friction. through a viscous medium, there will be a resistance to the motion. and its environment
Forces of Friction When an object is in motion on a surface or through a viscous medium, there wi be a resistance to the motion This is due to the interactions between the object and its environment This
More informationGauss Law. 2. Gauss s Law: connects charge and field 3. Applications of Gauss s Law
Gauss Law 1. Review on 1) Couomb s Law (charge and force) 2) Eectric Fied (fied and force) 2. Gauss s Law: connects charge and fied 3. Appications of Gauss s Law Couomb s Law and Eectric Fied Couomb s
More informationMath 124B January 31, 2012
Math 124B January 31, 212 Viktor Grigoryan 7 Inhomogeneous boundary vaue probems Having studied the theory of Fourier series, with which we successfuy soved boundary vaue probems for the homogeneous heat
More informationSeveral Rules about the Magnetic Moment of Rotational Charged Bodies
IES ONLINE, VOL. 3, NO. 6, 007 81 Severa ues about the Magnetic Moment of otationa Charged Bodies Guo-Quan Zhou Department of hsics, Wuhan Universit, Wuhan 43007, China Abstract A strict and deicate anaog
More informationHYDROGEN ATOM SELECTION RULES TRANSITION RATES
DOING PHYSICS WITH MATLAB QUANTUM PHYSICS Ian Cooper Schoo of Physics, University of Sydney ian.cooper@sydney.edu.au HYDROGEN ATOM SELECTION RULES TRANSITION RATES DOWNLOAD DIRECTORY FOR MATLAB SCRIPTS
More informationProceedings of Meetings on Acoustics
Proceedings of Meetings on Acoustics Voume 9, 23 http://acousticasociety.org/ ICA 23 Montrea Montrea, Canada 2-7 June 23 Architectura Acoustics Session 4pAAa: Room Acoustics Computer Simuation II 4pAAa9.
More informationMath 1600 Lecture 5, Section 2, 15 Sep 2014
1 of 6 Math 1600 Lecture 5, Section 2, 15 Sep 2014 Announcements: Continue reading Section 1.3 and aso the Exporation on cross products for next cass. Work through recommended homework questions. Quiz
More informationSEMINAR 2. PENDULUMS. V = mgl cos θ. (2) L = T V = 1 2 ml2 θ2 + mgl cos θ, (3) d dt ml2 θ2 + mgl sin θ = 0, (4) θ + g l
Probem 7. Simpe Penduum SEMINAR. PENDULUMS A simpe penduum means a mass m suspended by a string weightess rigid rod of ength so that it can swing in a pane. The y-axis is directed down, x-axis is directed
More informationJackson 4.10 Homework Problem Solution Dr. Christopher S. Baird University of Massachusetts Lowell
Jackson 4.10 Homework Probem Soution Dr. Christopher S. Baird University of Massachusetts Lowe PROBLEM: Two concentric conducting spheres of inner and outer radii a and b, respectivey, carry charges ±.
More informationUPDATE OF THE SPS KICKERS
UPDATE OF THE SPS KICKERS B. Salvant and E. Métral APC action (0//06): The Committee but it stressed the importance of evaluating the effect of the resonance peaks observed at low frequency on the longitudinal
More informationChemical Kinetics Part 2
Integrated Rate Laws Chemica Kinetics Part 2 The rate aw we have discussed thus far is the differentia rate aw. Let us consider the very simpe reaction: a A à products The differentia rate reates the rate
More informationUI FORMULATION FOR CABLE STATE OF EXISTING CABLE-STAYED BRIDGE
UI FORMULATION FOR CABLE STATE OF EXISTING CABLE-STAYED BRIDGE Juan Huang, Ronghui Wang and Tao Tang Coege of Traffic and Communications, South China University of Technoogy, Guangzhou, Guangdong 51641,
More informationFunction Matching Design of Wide-Band Piezoelectric Ultrasonic Transducer
Function Matching Design of Wide-Band Piezoeectric Utrasonic Transducer Yingyuan Fan a, Hongqing An b Weifang Medica University, Weifang, 261053, China a yyfan@126.com, b hongqingan01@126.com Abstract
More informationLayer Guided SH-APM Sensors
Layer Guided SH-APM Sensors Gen McHae, M. I. Newton and F. Martin Department of Chemistry and Physics The Nottingham Trent Uniersity Nottingham NG 8NS, UK Acknowedgements Dr Eectra Gizei and Dr Kathryn
More informationCharged Particles Electric Dipole Moment Searches in Storage Rings
Charged Partices Eectric Dipoe Moment Searches in Storage Rings Paoo Lenisa Università di Ferrara and INFN - Itay MESON 2016 Krakow, Poand, June 4 th 2016 Eectric Dipoes Definition p =q s Charge separation
More informationFaculty of Machine Building. Technical University of Cluj Napoca
Facuty of Machine Buiding Technica University of Cuj Napoca CONTRIBUTIONS TO THE CALCULATION AND ANALYSIS OF DYNAMIC ABSORBERS, WITH APPLICATIONS ON BALANCING MECHANICAL SYSTEMS PhD THESIS 11 Scientific
More informationMINOS Layout. Gary Feldman SLAC Summer Institute August
MINOS Layout Gary Fedman SLAC Summer Institute 14-5 August 000 89 MINOS Far Detector 8m octagona tracking caorimeter 486 ayers of 1 in iron pates 4.1 cm-wide scintiator strips with WLS fiber readout, read
More informationEXACT CLOSED FORM FORMULA FOR SELF INDUC- TANCE OF CONDUCTOR OF RECTANGULAR CROSS SECTION
Progress In Eectromagnetics Research M, Vo. 26, 225 236, 22 EXACT COSED FORM FORMUA FOR SEF INDUC- TANCE OF CONDUCTOR OF RECTANGUAR CROSS SECTION Z. Piatek, * and B. Baron 2 Czestochowa University of Technoogy,
More information1D Heat Propagation Problems
Chapter 1 1D Heat Propagation Probems If the ambient space of the heat conduction has ony one dimension, the Fourier equation reduces to the foowing for an homogeneous body cρ T t = T λ 2 + Q, 1.1) x2
More informationBernhard Holzer, CERN-LHC
Bernhard Holzer, CERN-LHC * Bernhard Holzer, CERN CAS Prague 2014 x Liouville: in reasonable storage rings area in phase space is constant. A = π*ε=const x ε beam emittance = woozilycity of the particle
More informationEXPERIMENT 5 MOLAR CONDUCTIVITIES OF AQUEOUS ELECTROLYTES
EXPERIMENT 5 MOLR CONDUCTIVITIES OF QUEOUS ELECTROLYTES Objective: To determine the conductivity of various acid and the dissociation constant, K for acetic acid a Theory. Eectrica conductivity in soutions
More informationTorsion and shear stresses due to shear centre eccentricity in SCIA Engineer Delft University of Technology. Marijn Drillenburg
Torsion and shear stresses due to shear centre eccentricity in SCIA Engineer Deft University of Technoogy Marijn Drienburg October 2017 Contents 1 Introduction 2 1.1 Hand Cacuation....................................
More informationLongitudinal Dynamics
Longitudinal Dynamics F = e (E + v x B) CAS Bruges 16-25 June 2009 Beam Dynamics D. Brandt 1 Acceleration The accelerator has to provide kinetic energy to the charged particles, i.e. increase the momentum
More informationCommissioning of PETRA III. Klaus Balewski on behalf of the PETRA III Team IPAC 2010, 25 May, 2010
Commissioning of PETRA III Klaus Balewski on behalf of the PETRA III Team IPAC 2010, 25 May, 2010 PETRA III Parameters Circumference (m) Energy (GeV) ε x (nm rad) ε y (pm rad) Current (ma) # bunches Straight
More informationModule 22: Simple Harmonic Oscillation and Torque
Modue : Simpe Harmonic Osciation and Torque.1 Introduction We have aready used Newton s Second Law or Conservation of Energy to anayze systems ike the boc-spring system that osciate. We sha now use torque
More informationCABLE SUPPORTED STRUCTURES
CABLE SUPPORTED STRUCTURES STATIC AND DYNAMIC ANALYSIS OF CABLES 3/22/2005 Prof. dr Stanko Brcic 1 Cabe Supported Structures Suspension bridges Cabe-Stayed Bridges Masts Roof structures etc 3/22/2005 Prof.
More informationEs#ma#ons of Collec#ve Instabili#es for JLEIC
Es#ma#ons of Collec#ve Instabili#es for JLEIC Rui Li JLEIC Collabora#on Mee#ng 4-3-2016 Collec#ve Effects in JLEIC Electron Ring Ion Rings Electron Cooler Incoherent: LasleD tune shie, emidance growth
More informationarxiv: v2 [cond-mat.stat-mech] 14 Nov 2008
Random Booean Networks Barbara Drosse Institute of Condensed Matter Physics, Darmstadt University of Technoogy, Hochschustraße 6, 64289 Darmstadt, Germany (Dated: June 27) arxiv:76.335v2 [cond-mat.stat-mech]
More informationTRANSVERSE DAMPER. W. Höfle, CERN, Geneva, Switzerland. Abstract INTRODUCTION AND HIGHLIGHTS IN Controlled Transverse Blow-up
TRANSVERSE DAMPER W. Höfle, CERN, Geneva, Switzerland Abstract Plans for the operation of the transverse damper in 2012 at bunch spacings of 50 ns and 25 ns and at increased collision energy will be reviewed.
More informationNonperturbative Shell Correction to the Bethe Bloch Formula for the Energy Losses of Fast Charged Particles
ISSN 002-3640, JETP Letters, 20, Vo. 94, No., pp. 5. Peiades Pubishing, Inc., 20. Origina Russian Text V.I. Matveev, D.N. Makarov, 20, pubished in Pis ma v Zhurna Eksperimenta noi i Teoreticheskoi Fiziki,
More informationOn a geometrical approach in contact mechanics
Institut für Mechanik On a geometrica approach in contact mechanics Aexander Konyukhov, Kar Schweizerhof Universität Karsruhe, Institut für Mechanik Institut für Mechanik Kaiserstr. 12, Geb. 20.30 76128
More informationO9e Fringes of Equal Thickness
Fakutät für Physik und Geowissenschaften Physikaisches Grundpraktikum O9e Fringes of Equa Thickness Tasks 1 Determine the radius of a convex ens y measuring Newton s rings using ight of a given waveength.
More information18-660: Numerical Methods for Engineering Design and Optimization
8-660: Numerica Methods for Engineering esign and Optimization in i epartment of ECE Carnegie Meon University Pittsburgh, PA 523 Side Overview Conjugate Gradient Method (Part 4) Pre-conditioning Noninear
More informationUnit 48: Structural Behaviour and Detailing for Construction. Deflection of Beams
Unit 48: Structura Behaviour and Detaiing for Construction 4.1 Introduction Defection of Beams This topic investigates the deformation of beams as the direct effect of that bending tendency, which affects
More informationCOMBINER RING LATTICE
CTFF3 TECHNICAL NOTE INFN - LNF, Accelerator Division Frascati, April 4, 21 Note: CTFF3-2 COMBINER RING LATTICE C. Biscari 1. Introduction The 3 rd CLIC test facility, CTF3, is foreseen to check the feasibility
More informationPhysics 127c: Statistical Mechanics. Fermi Liquid Theory: Collective Modes. Boltzmann Equation. The quasiparticle energy including interactions
Physics 27c: Statistica Mechanics Fermi Liquid Theory: Coective Modes Botzmann Equation The quasipartice energy incuding interactions ε p,σ = ε p + f(p, p ; σ, σ )δn p,σ, () p,σ with ε p ε F + v F (p p
More informationСРАВНИТЕЛЕН АНАЛИЗ НА МОДЕЛИ НА ГРЕДИ НА ЕЛАСТИЧНА ОСНОВА COMPARATIVE ANALYSIS OF ELASTIC FOUNDATION MODELS FOR BEAMS
СРАВНИТЕЛЕН АНАЛИЗ НА МОДЕЛИ НА ГРЕДИ НА ЕЛАСТИЧНА ОСНОВА Милко Стоянов Милошев 1, Константин Савков Казаков 2 Висше Строително Училище Л. Каравелов - София COMPARATIVE ANALYSIS OF ELASTIC FOUNDATION MODELS
More informationLecture 17 - The Secrets we have Swept Under the Rug
Lecture 17 - The Secrets we have Swept Under the Rug Today s ectures examines some of the uirky features of eectrostatics that we have negected up unti this point A Puzze... Let s go back to the basics
More informationXSAT of linear CNF formulas
XSAT of inear CN formuas Bernd R. Schuh Dr. Bernd Schuh, D-50968 Kön, Germany; bernd.schuh@netcoogne.de eywords: compexity, XSAT, exact inear formua, -reguarity, -uniformity, NPcompeteness Abstract. Open
More informationRELUCTANCE The resistance of a material to the flow of charge (current) is determined for electric circuits by the equation
INTRODUCTION Magnetism pays an integra part in amost every eectrica device used today in industry, research, or the home. Generators, motors, transformers, circuit breakers, teevisions, computers, tape
More informationSupporting Information for Suppressing Klein tunneling in graphene using a one-dimensional array of localized scatterers
Supporting Information for Suppressing Kein tunneing in graphene using a one-dimensiona array of ocaized scatterers Jamie D Was, and Danie Hadad Department of Chemistry, University of Miami, Cora Gabes,
More informatione + e Factories M. Sullivan Presented at the Particle Accelerator Conference June 25-29, 2007 in Albuquerque, New Mexico e+e- Factories
e + e Factories M. Sullivan Presented at the Particle Accelerator Conference June 25-29, 2007 in Albuquerque, New Mexico 1 Outline Factory Running KEKB PEP-II DAFNE CESR-c BEPCII 2 Summary Factory Running
More informationIn-plane shear stiffness of bare steel deck through shell finite element models. G. Bian, B.W. Schafer. June 2017
In-pane shear stiffness of bare stee deck through she finite eement modes G. Bian, B.W. Schafer June 7 COLD-FORMED STEEL RESEARCH CONSORTIUM REPORT SERIES CFSRC R-7- SDII Stee Diaphragm Innovation Initiative
More informationCandidate Number. General Certificate of Education Advanced Level Examination June 2010
Centre Number Surname Candidate Number For Examiner s Use Other Names Candidate Signature Examiner s Initias Genera Certificate of Education Advanced Leve Examination June 2010 Question 1 2 Mark Physics
More informationCopyright information to be inserted by the Publishers. Unsplitting BGK-type Schemes for the Shallow. Water Equations KUN XU
Copyright information to be inserted by the Pubishers Unspitting BGK-type Schemes for the Shaow Water Equations KUN XU Mathematics Department, Hong Kong University of Science and Technoogy, Cear Water
More information