Status of Aerogel detector for high pT upgrade at PHENIX Budget from US-J project for next two years : (1) 400 liters of Aerogel (2) 600 photomultiplier.

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Presentation transcript:

Status of Aerogel detector for high pT upgrade at PHENIX Budget from US-J project for next two years : (1) 400 liters of Aerogel (2) 600 photomultiplier tubes (3) read-out electronics (4) detector construction (5) one additional TOF panel Preliminary design 12x12x10 cm 3, 300 segmentations, 2 tubes each 2x2 m 2 (4 TOF panels) at r=4.5m in west arm Laser test for Aerogel optical properties determine  absorption,  scattering for the different wave length and the index of Aerogel Beam test with several prototypes at KEK-PS Belle type (2 PMTs directly on both sides of Aerogel) Mirror type (mirror and PMT behind of Aerogel) reflective material, thickness, position, angle and momentum dependence Simulation study with pisa 5% occupancy with Hijing central Au+Au (20% for all the charged tracks)

PMT Laser PMT Laser test (a)(b)(c) setup (a) for different wave lengths compare measurements and optical monte-carlo to determine  absorption,  scattering with  2 minimization

Beam test at KEK-PS, 2001/Dec  p beam * logZ scale

Type ReflectorIndex Mom. (GeV ) N photo-ele (PMT1) (R V) N photo-ele (PMT2) (R V) BelleGoretex BelleMillipore BelleTyvek Mirror (Flat) Tyvek ― Mirror (Parabolic) Tyvek ― PMT Belle Type Mirror Type beam described by the expected Cherenkov radiation given by the index and pion mass z x

Belle type with Goretex reflector Mirror type with Tyvek reflector x x

5% occupancy with Hijing central Au+Au number of fired block / event z (cm) x (cm) background sources for tracks which hit any of Aerogel block, many events overlaid magnet RICH mirror Aerogel beam line PISA simulation with Aerogel

Aerogel counter prototype in the test beam line at KEK-PS 2001/Dec Aerogel in a Belle prototype Konno, Ohki Aerogel counter simulation Takagi

Summary of status (1)definition of the project * to enhance PID capability of PHENIX upto 10GeV/c with Aerogel, TOF and RICH *~400 liters of Aerogel with ~300 segmentation, which is 4 TOF panels equivalent (2) Detector R&D *2001/Dec test experiment at KEK-PS *Belle/mirror types are tested, the best result (>20pe) is with Belle type with 3”PMT and Goetex reflector. *Next test beam is planned before 2002/Summer. *Detailed study for the absorption and scattering length as a function of wave length with laser and spectrometer is in progress. (3) PISA simulation *PISA simulation activity has been started at Tsukuba, ~300 Aerogel counters have been installed in west arm. *Occupancy and background studies have been started. (4) Budget and construction *Purchase of Aerogel and PMTs with US-J budget will be started in 2002 and finished in *Dubna may be interested in the construction of detector, Y.Miake will visit Dubna in March for further discussion. (5) Issues and concerns *2 TOF panels will be moved from east arm to west. 1 spare panel exists at BNL. 1 panel will be newly build. *Read-out electronics designed for RICH will be copied, but it needs to be studied in detail.