1. MICE - Detector Safety/Integration

2. MICE - Detector Safety/Integration – Detectors external to Magnetic Volume  Detectors external to magnetic volume u All use Photo-Multiplier Tubes (PMTs) – Only active component s Power –HV: 1-2.5 kV @ 1mA s Output –Low level signal –Front-end crates (can be located far (>20m) away except for TOF CAMAC/VME electronics Low voltage, 2-5 KW per crate is typical

3. MICE Tracker – Internal to Magnetic Volume  Detectors in magnetic volume–Trackers (2) s Fiber Tracker (scintillating fiber) –Totally passive within magnet (no power, gas, HV, etc) Electronics external – Front-end near (3m) low voltage (2 kW total) + Front-end racks within 15m –Needs Vacuum seal, however where optical signals are brought out This has been done for other experiments, 10 -6 vacuum level in tracker volume should be easy to obtain (depends on pumps) Electronics Optical Fiber

4. MICE Tracker – Internal to Magnetic Volume (Backup Option) u We also have a backup Option for the tracker s TPG (Time projection chamber with GEM readout) –Gaseous device (He-ethane) Non-flammable –HV: 50 kV on central membrane (1-10+ J stored energy) Electronics external – low voltage near end of solenoid with Front- end racks within 15m HV power supply (50 KV) to supply drift field –This device has obvious active components inside tracking volume Electronics Copper Cable 50 KV

5. MICE - Detector Safety/Integration  The MICE detectors do not present a safety risk given the design of the absorber focus coil system and its redundancy with regard to H 2 safety u Although parts of the detector system do present an ignition source, they are never in direct contact with H 2  Tracker system (baseline) is totally passive internal to the magnetic volume  External detectors (Cerenkov, TOF, and calorimeter) do use active components (HV), but they are outside the Hydrogen zone.