Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 1/16

Outline RHIC and STAR STAR Time of Flight (TOF)

High and Low Voltage Power Supply

Control Interface Daya Bay

Detector Physics of Interest

PMT testing system: Single Photo-electrons (SPE) Layout Result

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 2/16

Relativistic Heavy Ion Collider (RHIC)

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 3/16

Solenoidal Tracker at RHIC (STAR)

TOF

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 4/16

TOF System

Multi-gap Resistive Plate Chamber (MRPC) was developed by CERN US and China did R&D on the detector

MRPC modules produced in China and TOF tray assembled in US

Completion date: 2009 UCLA’s responsibility

High/Low Voltage Power Supplies Control Interface for Power Supplies

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 5/16

Power Supplies

High Voltage: CAEN SY1527LC: 8kV @ 200 A per Channel, 12 Channels Total (19.2 W)

Experimental Physics and Industrial Control System (EPICS) Interface

Low Voltage: Wiener PL512: 8V @ 20A per Channel, 12 Channels Per Crate, 10 crates (19.2kW)

LabVIEW Interface for 2007 Run Eventually in EPICS as well

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 6/16

HV EPICS

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 7/16

LV LabVIEW

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 8/16

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 9/16

Daya Bay

3 GWth give17.5 GWth in 2010

€

6 ×1020ν e

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 10/16

Daya Bay Detector & Signal

+ p D + (2.2 MeV) (delayed, 30-40 s) + Gd Gd* Gd + ’s (8 MeV)

(delayed, 30-40 s)

0.3 b

49,000 b€

ν e + p → e+ + n

+ 2 (1.2 MeV) (prompt)

€

e-

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 11/16

Physics of Interest

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 12/16

Physics of Interest Continued

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 13/16

PMT Test Stand PMT Test Stand (schematically)

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 14/16

PMT Test Stand

PMTLED

DAQLabVIEWSteel Box

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 15/16

Single Photo-electron

gain = 1.88 x 107

25 fC/bin

QADC bins

Cou

nt

Berkeley Lab, May 24 2007 Bertrand H.J. Biritz 16/16

THANK YOU