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Instrumentation and Simulations for Target Test

Instrumentation and Simulations for Target Test. Bill Murray 1 , Paul Soler 1,2 , Kenny Walaron 1,2 1 Rutherford Appleton Laboratory 2 University of Glasgow. MICE Collaboration Meeting 22 October 2005. ISIS beam test (beg 2006).

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Instrumentation and Simulations for Target Test

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  1. Instrumentation and Simulations for Target Test Bill Murray1, Paul Soler1,2, Kenny Walaron1,2 1Rutherford Appleton Laboratory 2University of Glasgow MICE Collaboration Meeting 22 October 2005.

  2. ISIS beam test (beg 2006) Proposed location of instrumentation: same angle as MICE beamline (25o) but inside synchrotron ring, at 10m or 20m from target MICE Collaboration Meeting 22 October 2005

  3. protons p, m ISIS beam test (beg 2006) • Two scintillator hodoscope planes separated by a polyethylene filter. • If rate too high, use smaller plane in front. • Location: 10 m (or 20 m) from target area • Provides dE/dx signature and crude energy selection Segmented BC-404 scintillator dE/dx (MeV/cm) p, p, m P (GeV/c) Polyethylene filter MICE Collaboration Meeting 22 October 2005

  4. Particle Identification 20m from target 10m from target p p m p m p • Use dE/dx to separate protons from light particles • Allows us to count light and heavy species from target for validation of beamline simulations • Air affects average momentum and dE/dx for protons. • For example, protons at 440 MeV/c drop by 20 MeV/c in 10 m air. MICE Collaboration Meeting 22 October 2005

  5. Simulations for beam test • Simulation using MARS input for G4beamline • Selection of particles from target within acceptance at around 25o p: 38% n: 57% p: 1.6% MICE Collaboration Meeting 22 October 2005

  6. Simulations for beam test • 10 million protons generated in target • Numbers of events in detectors (all detectors 1 cm thick to start with): • Small scintillator (5 cm x 5 cm) at 9984 mm: 10 particles, 3 protons, 7 neutrons • Large scintillator 1 (40 cm x 40 cm) at 9994 mm: 775 particles, 288 protons, 460 neutrons, 8 pi+, 2 pi-, 3 mu+, 3 mu- • Absorber (40 cm x 40 cm) at 10005 mm: 745 particles, 274 protons, 448 neutrons, 8 pi+, 2 pi-, 3 mu+, 3 mu- • Large scintillator 2 (40 cm x 40 cm) at 9994 mm: 719 particles, 257 protons, 436 neutrons, 9 pi+, 2 pi-, 3 mu+, 3 mu- MICE Collaboration Meeting 22 October 2005

  7. Simulations for beam test 10m from target First scintillator p n p MICE Collaboration Meeting 22 October 2005

  8. Simulations for beam test 10m from target Absorber (1cm) p n Clearly, 1 cm thickness makes little difference. p MICE Collaboration Meeting 22 October 2005

  9. Simulations for beam test 10m from target Second scintillator p n p MICE Collaboration Meeting 22 October 2005

  10. Numbers • ISIS bunch is 2.5 1013 protons • We might intercept 1% before being shutdown? • 7.5 106 protons on 40cm2 detector • 4700 in a 3mm by 3 cm finger scintillator • Kenny: • Scintillator 40cm sq. at 10m • 288 protons • 11 pions • 10M P-o-T • 29 protons per 1M • 1.1 π • Bill: • Scintillator 40cm sq. at 10m • 55 protons • 6 (+14 mu,e) • 2.4M P-o-T • 23 protons per 1M • 2.5 π (+6.5 μ, e) MICE Collaboration Meeting 22 October 2005

  11. Simulations for beam test • At high momenta (above ~ 800 MeV/c), protons and lighter particles become indistinguishable. • At high momenta it doesn’t help to use Time of Flight information MICE Collaboration Meeting 22 October 2005

  12. Simulations for beam test Pions survival Protons survival Thickness scintillator (cm) Thickness scintillator (cm) • We can use range-out of protons to perform crude momentum separation • Protons range out very quickly (e.g. in 5cm scint. proton energy > 425 MeV) • Need to convolute survival probablilities with production to produce optimal arrangement. MICE Collaboration Meeting 22 October 2005

  13. x PMT2 PMT1 X L Q-ADC TDC Q-ADC TDC FAN IN/OUT FAN IN/OUT VME CRATE GATE GATE HIGH VOLTAGE Equipment for beam test • Have electronics, PMTs and UNIDAQ data acquisition installed at Glasgow (thank you Makoto and Malcolm!!!!). • Aim to start testing PMTs next week. MICE Collaboration Meeting 22 October 2005

  14. Proof! MICE Collaboration Meeting 22 October 2005

  15. Plans • Prepare for target test January 2005 inside ISIS ring . • Test station being set-up at Glasgow with UNIDAQ and read-out electronics: technical problems with DAQ resolved with Makoto and Malcolm’s help. • Test all PMTs and validate performance • Purchase Bicron BC-404 scintillator, light-guides and absorbers for precise geometry determined from simulation. • Electronics and PMT’s fully tested by end November 2005 • Install equipment in ISIS during December-January (ISIS shutdown) • Set-up triggering electronics and gated scalers for target monitoring • In parallel, develop simulations to define optimal geometry • Calculate particle momenta coming out of target: done • Run test-beam simulation to determine what configuration results in the maximum information that we can extract from target test (ie. ToF, dE/dx, optimum distance 10-20 m, use of different absorbers, …) • Determine rate per scintillator slab for different configurations • Write proposal to ISIS: target November 2005 MICE Collaboration Meeting 22 October 2005

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