Proton and neutron radiation facilities in the PS East hall at CERN
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1 Proton and neutron radiation facilities in the PS East hall at CERN M. Glaser, CERN Division EP-TA1-SD
2 Introduction CERN Accelerators CERN-PS East Hall Proton irradiation facilities Neutron irradiation facilities Dosimetry Mounting of samples Conclusions 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 2
3 CERN Accelerators IRRADIATION facilities 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 3
4 CERN-PS East Hall 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 4
5 Proton shuttle and inside area facilities T7 Beam Proton 24 GeV/c Spot = 2 x 2 cm 2 Inside table Marble Iron dump Concrete Shuttle railway 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 5
6 Proton irradiation facilitity characteristics Primary PS proton beam Beam line : PS-T7 Beam energy : 24 GeV/c Beam spot : 2 x 2 cm 2 Proton fluence p cm -2 s p cm -2 h -1 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 6
7 Proton facility - Shuttle Standard volume for irradiation 5 x 5 x 15 cm 3 Max. volume on request 10 x 10 x 20 cm 3 No restriction for access 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 7
8 Proton facility - Inside area Scanning over surface of 10 x 10 cm 2 Access only on PS machine development 8 hours every one or two weeks Max. volume 20 x 20 x 50 cm 3 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 8
9 Neutron facility - Shuttle T8 Beam Carbon block target Proton 24 GeV/c 20 x 20 x 50 cm 3 Spot (h,v) = 6 x 4 cm 2 Lead block target 80 x 80 x 10 cm 3 Iron dump Concrete Shuttle railway 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 9
10 Neutron irradiation facilitity characteristics Secondary particles in the irradiation cavity neutron : 50 KeV - 10 MeV p, π+, π- : GeV gamma : 100 KeV MeV Neutron fluence Shuttle position = 50 cm from beam axis n cm -2 s -1 ( E > 1 MeV ) 6 days for n cm -2 ( E > 1 MeV ) Dimensions Standard volume for irradiation 20 x 20 x 20 cm 3 Max. volume on demand ~ 30 x 30 x 35 cm 3 No restriction for access 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 10
11 Neutron facility - shuttle 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 11
12 FLUKA simulation for neutron facility M. Huhtinen CERN EP Particles flux Vs z[cm] 1.E-01 Particles flux (particles/cm2/proton) 1.E-02 1.E-03 1.E-04 n γ p π 1.E-05 z(cm) Preliminary 1999 Distance from beam axis 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 12
13 FLUKA simulation for neutron facility Secondary particles spectra at 0 & 50 cm versus Energy Edf/dE (cm 2 /proton) 1.E-01 1.E-02 1.E-03 1.E-04 1.E-05 Neutron Proton Pion Gamma Z = 0 (cm) n 1.E-11 1.E-08 1.E-05 1.E-02 1.E+01 E(GeV) γ 1 MeV p π Edf/dE (cm2/proton) 1.E-01 1.E-02 1.E-03 1.E-04 1.E-05 Neutron Proton Pion Gamma Z = -50 (cm) n 1 MeV 1.E-11 1.E-08 1.E-05 1.E-02 1.E+01 E(GeV) γ 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 13
14 Particles predicted by FLUKA for different energy cuts Back scattering 10 cm per cm -2 h -1 Energy Neutrons % Protons Pions Gammas > 1 ev 1.18E > 10 KeV 1.04E E E E+11 > 100 KeV 8.23E E E E+11 > 1 MeV 2.16E E E E+11 > 8 MeV 4.44E E E E+10 > 10 MeV 4.16E E E E+09 > 20 MeV 3.48E E E E+09 > 50 MeV 2.52E E E E+09 > 100 MeV 1.71E E E E+08 Back scattering 50 cm per cm -2 h -1 Energy Neutrons % Protons Pions Gammas > 1 ev 6.70E > 10 KeV 5.64E E E E+10 > 100 KeV 4.13E E E E+10 > 1 MeV 7.06E E E E+10 > 8 MeV 1.04E E E E+09 > 10 MeV 9.59E E E E+09 > 20 MeV 7.64E E E E+08 > 50 MeV 5.18E E E E+08 > 100 MeV 3.00E E E E+07 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 14
15 Irradiations with low flux of hadrons Low flux of hadrons (~ 4 x 10 9 cm -2 h -1 ) Test SEU, SEE. Electronic components Readout electronics can be installed on second platform (in distance of 50 cm) 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 15
16 Irradiations with low flux of hadrons calibration & simulation Ignasi Bacardit, Universitat politècnica de Catalunya Claude Leroy, University of Montreal Patrick Roy, University of Montreal Experimental / SIM 24 Na - Experimental / SIM 100K_ FonteGrise 31/5/2000 A 20/6/2000 N+S B 20/6/2000 South Axial Distance (cm) Flux (hadron/cm 2 s) Flux (hadrons/cm 2 s) 1.E+07 9.E+06 8.E+06 7.E+06 6.E+06 5.E+06 4.E+06 3.E+06 2.E+06 1.E+06 0.E+00 1.E+08 1.E+07 1.E+06 1.E+05 HADRON FLUX, E > 30 MeV (Experiment 23/05/2000, without Atlas Box) Axial Distance (cm) Experiment 31/05/ Axial Distance (cm) 500< p< 800 MeV, 27Al(p,x)7Be 8<n<18 MeV, 27Al(n,a)24Na 30< p< 800 MeV, 27Al(p,x)22Na 30< p< 800 MeV, 63Cu(p,x)58Co 3<n<15 MeV, 3<n<17 MeV, 58Ni(n,p)58Co 32S(n,p)32P 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 16
17 Dosimetry - Proton irradiation Guy Roubaud CERN TIS Fluence measurement By activation of Al foil 27 Al(p,3pn) 24 Na, 27 Al(p,3p3n) 22 Na Spectrometry with NaI spectrometer (+- 6%) 24 Na, halflife 15h, Eγ = kev Spectrometry with Ge spectrometer (+- 2%) NaI 24 Na, halflife 15h, Eγ = kev 22 Na, halflife 2.6y, Eγ = kev Ge 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 17
18 Dosimetry - Neutron irradiation Fluence measurement By activation of Al, Co, Ni, In, Au foils Spectrometry by Ge spectrometer Silicon detectors Reverse current measurement with I-V/C-V Bench test Radfets, Pin diodes for Gamma s dosimetry Voltage measurement with stable current source Dosimeters SI, Radfet, AL, Glass,Alanine. 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 18
19 Irradiation, Storage, Expedition..in % more than Hours of proton irradiation (142 Days) 1099 Hours of neutron irradiation (46 Days) 649 Dosimetry with NaI spectrometer 430 Samples irradiated to store 165 Dosimetry with Ge spectrometer 65 Users from 30 institutes 55 Expeditions all aver the world o C) 50 Dosimetry with Si detector 5 Different places for storage (with freezer) This year...? 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 19
20 Samples irradiated 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 20
21 Irradiation time table for 2001 Proton facilities Neutron facilities 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 21
22 Registration, time table, info 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 22
23 New developments Rawi Eggert, Karlsruhe University Automation & Functionality Registration Dosimetry security Traceability Radiation Sample Check Spectrometer control and fluence calculation Data management User alarm system SEC Fluence Monitoring Sample irradiation scheduling 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 23
24 New developments Situation in November 2000 EP-TA1-SD IRRAD Facility Results Sample + papers Situation in August 2001 Irradiation? www User / Sample Registration! CERN Network IRRAD Data CERN www IRRAD Control Software www - Results - 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 24
25 Laboratory facilities IV-CV bench test Cryostat for DLTS Probe station Charge collection by Laser 3 Furnaces for Si treatment Charge collection by Radioactive sources 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 25
26 Neutrons irradiation facility at the Ljubljana TRIGA MARK II Research Reactor 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 26
27 Pions irradiation facility at the PSI Villigen 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 27
28 Conclusions Shuttles Fast irradiation : sample exchange without beam stop Improved radiation safety : no access to irradiation area needed IRRAD 1 & IRRAD 3 Convenient for 24 GeV proton irradiation Including irradiation at C ( IRRAD 3) IRRAD 2 Spectrum dominated by neutron Radiation field similar to LHC trackers field IRRAD 4 Low flux backscattered hadrons Convenient for SEE, SEU electronic events FLUKA simulations Good agreement with measured spectra 1st Workshop on Quality Assurance Issues in Silicon Detectors CERN May, 2001 M. Glaser Cern-EP-TA1-SD 28
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