Charged Cosmic Ray Physics
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- Bonnie Taylor
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1 Charged Cosmic Ray Physics hip region: absolute flux of var. primaries cosmology antimatter SUSY knee region: CR composition knee position for var. primaries CR source type? CR travel distance? ankle region: GZK cutoff CR direction CR point sources GZK cosmology Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 1
2 How to measure Cosmic Rays Direct Measurements (E < ev): Balloon Satellite Indirect Measurements (EAS, E > ev): Scintillator detector array Cherenkov counter array Tracking chambers Cherenkov tank detector array Fluorescence telescopes... (?) Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 2
3 Sketches photon 1014 ev of different showers... iron proton 1014 ev 1014 ev red = electrons, positrons, gammas green = muons blue = hadrons Energy cuts: 0.1 MeV for e+-, gammas 0.1 GeV for muons, hadrons Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 3
4 Sketches of single components proton shower Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 4
5 Balloon Measurements: CAPRICE98 New Mexico Arizona, US, 1998 at 5.5 g/cm² ~ 37 km ~ 4.5 mbar p, He: GeV p, d : 3 49 GeV Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 5
6 Satelliten-Experimente ISS Höhe: ~ 340 km Startdatum: 29. July 2010, Endeavour STS-134 Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 6
7 Satellite Measurements: PAMELA altitude: km p, He, Be, C: GeV p : GeV e : GeV e + : GeV Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 7
8 Launch in Bajkonur: 15 th June 2006 Resurs-DK1 Satellite Resurs-DK1 Satellite PAMELA Detector Launch of Resours-DK1 with PAMELA antimatter spectometer Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 8
9 Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 10
10 The TOF System - 3 Planes of Scintillators S1, S2, S3 Each hodoscope plane with 2 crossed layers, segmented in X/ Y strips - Total: 48 Channels - Ham. PMT R paddle ~ 110ps, TOF ~ 330ps (MIP) Used for : TRIGGER: crossing particles TOF: ParticleID and for Albedo rejection (upward) de/dx measurements Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 11
11 Antiproton-Proton Ratio ~ 500 days of data, 1 billion triggers Results agree with theoretical expectations for secondary emission! Phys. Rev. Lett. 102, (2009) Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 12
12 Exciting Result: Positron Fraction! Separation of positrons and protons e - e + Protons Nature 458, (2 April 2009) High statistic results disagree with conventional models at high energies! primary positron emission from nearby pulsars or dark matter annihilation? Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 13
13 Neutralino annihilation Production takes place everywhere in the halo!! Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 14
14 Measurement of primary and secondary CR elements A really CRITICAL point! The possibility to disentangle exotic signal from pure secondary production depends strongly on the precise knowledge of the parameters which regulate the diffusion of cosmic rays in the Galaxy. Boron/Carbon ratio DIFFERENT diffusion coeff.: K(E)= K 0 R 0.3 δ: Magnetic rigidity R pc ze Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 15
15 Orbit characteristics km SAA km Quasi-polar (70.0 ) Elliptical ( km) In the South Pole PAMELA crosses the electron Van Allen belt, and for some orbits the SAA (South Atlantic Anomaly) Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 16
16 Trigger & DataRate TOF Scintillator Coincidence S1 x S2 x S3 out of Belts and SAA S2 x S3 elsewhere Average trigger rate 25 Hz (for orbits with SAA). DownLink 25 Hz x 5kB/evt ~ 10 GB/day (compressed mode) Up to 20 GB daily accumulation + downlink in a few ground-connections Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 17
17 Physics packets rate 30 Hz 15 Hz Data rate consistent with the position along the orbit Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 18
18 Flight data: 36 GV interacting proton Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 19
19 Extended AirShowers (EAS): Detection Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 20
20 Extended AirShowers (EAS): Results Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 21
21 Scintillator Arrays I: KASCADE(-GRANDE) Complex array consisting of: KASCADE-array: hadron calorimeter e/μ scintillator array muon tracking chamber GRANDE-array: scintillator array: 0.5 m² 37 stations x 10 m² = 370 m² piccolo trigger array Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 22
22 KASCADE-array KASCADE Station distance: 13 m Array size: 200 x 200 m 2 GRANDE Station distance: 130 m Array size: 0.5 km 2 Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 23
23 KASCADE-array: Detectors Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 24
24 Longitudinal Profiles - Energies Shower Maximum: X max ~ ln (E 0 ) Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 25
25 Longitudinal Profiles e/μ-ratio On ground level, Fe showers are older than p showers weaker em. component e/μ-ratio lower Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 26
26 KASCADE: Results ] 1.5 [m -2 s -1 sr -1 GeV QGSJet 01 E dn/de proton helium carbon primary energy E [GeV] integral knee: index change from -2.7 to -3.1 at (3.96 ± 0.84) PeV knee positions: E p < E He < E C < E Fe (Plots & Values: H. Ulrich, Kascade Collaboration) Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 27
27 Cherenkov Counter Arrays: TUNKA Č light KASCADE: CR Composition from e/μ fraction TUNKA: CR Composition from depth of shower maximum determination Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 28
28 TUNKA: Array Tunka Valley, Lake Baikal, RUS TUNKA-25: 0.11 km² 25 stations 6 x < E < ev TUNKA-133: 1 km² 133 (bigger) stations 6 x < E < ev Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 29
29 Cherenkov Tank arrays: IceTop Southpole, Antarctica 1 km² 80 Stations x 2 x 3.14 m² = 503 m² Energieschwelle: E > 0.3 PeV slightly larger than K-GRANDE IceTop Tanks with sunshades Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 30
30 IceTop Tanks HG DOM LG DOM Perlite 0.9 m 0.6 m Ice Diffus reflektierende Schicht 2.0 m Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 31
31 Digitales Optisches Modul Minimiere Signalverlust Minimiere Anzahl der Auslesekanäle (Kabel) Minimiere Datenaufkommen PMT mit integrierter HV-Versorgung Digitalisierung Lokale Koinzidenz mit Nachbarn Kalibrierung und Tests Autonome Steuerung DOM Funktionsweise eines Photomultipliers (PMT): 32 cm Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 32
32 Neutrinoteleskop IceCube IceTop : 320 optische Sensoren... in 160 Eistanks...auf 1 km² Fläche 4800 optische Sensoren... an 80 Trossen...in 1 km³ Eis Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 33
33 Luftschauer, Atomkerne und Myonbündel geladener Atomkern ausgedehnter Teilchenschauer elektromagnetisch Signatur: Licht in mehreren IceTop-Tanks und/oder eine lange, sehr helle Lichtspur im Eis Myonen Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 34
34 Koinzidentes Ereignis Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 35
35 HiRes: Telescopes HiRes-1: ev 21 mirrors 3-17 elevation 5 m² mirrors 256 pixel camera HiRes-2: ev 42 mirrors (2 rows) 3-31 elevation Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 36
36 Auger Observatory Surface Array + Fluorescence Telescopes Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 37
37 AUGER: Surface Detector 3000 km² = 30 x AGASA 1600 Cherenkov tanks = 16 x AGASA 1600 x 10 m² = m² = 65 x AGASA E > 5 x ev Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 38
38 Auger Fluorescence Telescopes Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 39
39 Fluorescence Reconstruction E prim X 1 de dx dx Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 40
40 Surface Reconstruction Energy from fluorescence detector Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 41
41 X max and Mass Composition Elongation rate Composition seems the get heavier above 2 x ev Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 42
42 Energy Spectrum Hybrid Energy Spectrum Auger 2009 GZK region Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 43
43 UHEAS Auger 2009 Auger and Hires see GZK-Cutoff! GZK-Effect: Sources of UHECRs are at distances > 50 Mpc Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 44
44 DESY Summer Students Hermann Kolanoski, Astroteilchenphysik WS09/10-3.Kosm.Strahlung 45
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