MICE SciFi-tracker prototype

• MICE experiment• Tracker: alternative technologies• SciFi tracker• Single-station prototype – mechanical status• Single-station prototype schedule and team

The MICE apparatus

NB: Particle identification crucial – to avoid bias in require non-muon contamination in final sample must be at most 1‰

TPG – TPC with GEM readout

TrackerBaseline Alternative

Scintillating fibre

• No active electronics/HV close to liquid hydrogen absorber

• No copper close to RF (low pickup)

• 350 fibre: 3-fold doublet; 0.35% X0

• VLPC read-out: high quantum-efficiency, high gain

• Sum neighboring fibres to reduce channel count?

• Light gas (0.15% X0)

• Many points per track

• High precision track recn possible

• Large integration time

• Effect of X-rays on GEMs

MICE SciFi tracker

MICE SciFi group:

UK groups with Fermilab, IIT, UCLA, Riverside, KEK and Osaka

Magnet: warm bore 40 cm

SciFi: active area diameter 30 cm

Single station prototype – mechanical status

#1 ‘services ring’Fibre station:

Detail of design of optical connector

Combining neighbouring channels• 7 scint. fibres to 1 readout fibre: reduce channel count (cost)

pT resolution

(pT)

Baseline: 0.17 MeV/c

7-to-1 mux: 0.27 MeV/c

resolution degrades by ~1.6

Single-station prototype: schedule and team

Single-station prototype: schedule and team

• SciFi team: Japan:

• Y.Kuno, A.Sato, H.Sakamoto, K.Yoshimura, M.Yoshida, UK:

• G.Barber, P.Cooke, R.Gamet, E.McKigney, R.Goncalo, M.Ellis, K.Long, J.Sedgbeer

US:• A.Bross, A.Klier, D.Kaplan, G.Hanson, X.Yang

Preparation for test in D0 VLPC test-stand• This week planning in detail preparation for test• So far have reviewed mechanics and planned for

construction• Still to do:

Electronics (today) Schedule/personnel plan for preparation of software

etc. for run at test-stand at D0

• Very grateful to be allowed access to test-stand!