1. February 8 th, 2001 Status Report: SciFi for MICE Edward McKigney Imperial College London

2. February 8 th, 2001 Overview Data Taking Cycle for MICE RF Background estimate for MICE MuScat Detectors Baseline MICE Tracking Detectors

3. February 8 th, 2001 Data Taking Cycle One Muon/Pulse Governed by machine and RF rep rate (max 50 Hz) Effectively about 15 Hz to eliminate occupancy problems 10 6 events in 18 hours May be stability issues Multiple Muons/Pulse Same as One Muon/pulse + RF flattop, detector response and DAQ buffering Should be able to gain at least a factor of 100 over One Muon/Pulse

4. February 8 th, 2001 X-ray Background

5. February 8 th, 2001 Background Estimate for MICE The fiber data used a single 1 mm diameter round fiber 10 cm long MICE baseline is 0.5 mm diameter by 30 cm Rate is like diameter 2 Assume 1000 fibers per layer and a tolerance of 1 extra hit per layer in a 50 ns window. Tolerable noise rate is about 20 kHz per fiber Can tolerate roughly 4 MV/m, from our measurements

6. February 8 th, 2001 The MuScat Experiment

7. February 8 th, 2001 Scintillating Fiber Tracker Three planes of 1 mm diameter fibers (x and y) Position resolution of about 200 microns Efficiency greater than 95%

8. February 8 th, 2001 MuScat Test Beam Data taken using the HEP test beam at RAL mixed pion and muon beam at 260 MeV/c Measured efficiency for one doublet layer was 93.6  0.5(stat.)% This was the first plane made, we expect improvement

9. February 8 th, 2001 Photo-electron distribution

10. February 8 th, 2001 MICE Detector Parameters 30 cm radius active area 0.4% X 0 thickness High Efficiency Position resolution of better than 200  m Capability to handle x- ray background rates Capability to survive RF induced radiation damage

11. February 8 th, 2001 Recent Developments C. Perry from Oxford has investigated building a simple front end to read out PMTs or HPDs for use with MICE Based on a simple comparator, time above threshold pulse height measurement and FPGA for buffering; USB for readout Dominant cost is for PMTs

12. February 8 th, 2001 Conclusions A burst type DAQ seems the best solution for reading out the detectors First indication is that backgrounds can be controlled by keeping the accelerating gradient relatively low, but much more work is needed More work has gone into studying readout electronics and options, but efficiency and cost point to use of VLPCs