Tentative plan for the ILC beamtest KEK new

Tentative plan for the ILC beamtest @ KEK new beamline S. Uozumi (Shinshu) for the GLD Calorimeter Group Jun-22 2007 New Beamline meeting

The GLD ECAL Test Module MPPCs (1600 pixels) Tungsten (3. 5 mm thick) Scintillator layer (3 mm thick) Acryl Frame Scintillator strip WLS fiber (1 x 4. 5 x 0. 3 cm)

3 Types of Modules ① WLSF readout 13 layers ② Direct readout 13 layers ①② ②① ③① Beam F R 13 + 13 layers ③ WLSF readout by extrusion technique 13 layers

Fiber readout extruded Response for MIP (DESY beam test data) Strip # Layer # Signal (ADC counts) Response uniformity of 3 different types of scintillators Fiber readout MPPC Direct readout Beam position (mm) Beam Extruded scint.

Why the extruded scintillator shows such low light yield and non-uniformity? Hole size

Objectives of the KEK beam test • Check performance of various scintillator strips using the high energy beam – Evaluate light yield, response uniformity, variation – Compare characteristics of 3~4 different scintillators – Need to establish extruded scintillator strips for next ECAL prototype beam test in 2008 at FNAL

Beam Test Plan (tentative) Strip scintillators Sci-Fi trackers Beam Trigger counters • MIP scan of the scintillator strips • MPPC signal are read by CAMAC ADC • Tracking with Sci-Fi tracker (position resolution ~ 1 mm) • 2 -3 people from KNU (Korea), 2 -3 from Japan • Very tentative schedule : – ~ 3 days for setup (need 1 -2 days access to beamline) – ~ 3 days for beam run (including 1 day commissioning) – ~ 1 day for withdrawal

Necessary devices on the beamline • Trigger & veto counters – Available at Shinshu • Sci-Fi tracker with readout system (or better tracker) – need to dig out from ILC equipment pool • Movable stage – – Stage size at least 20 x 20 cm Can move in range of +- 5 cm in vertical and horizontal directions Position determination accuracy < 1 mm Remote controlling (via RS-232 C? ) is preferable • CAMAC, NIM, PC – Will be very helpful if there are these equipments for common use