1 / 6

Boris Khachaturov, Alexander Kozlov, Alexander Milov, Ilia Ravinovich and Itzhak Tserruya

Update on HBD R&D at the WIS. Boris Khachaturov, Alexander Kozlov, Alexander Milov, Ilia Ravinovich and Itzhak Tserruya Weizmann Institute, Israel Feb. 12, 2002 http://www.phenix.bnl.gov/WWW/p/draft/tserruya/HBD/1-12-R&D-update.ppt. Rates and Yields.

shaeleigh-aguirre
Download Presentation

Boris Khachaturov, Alexander Kozlov, Alexander Milov, Ilia Ravinovich and Itzhak Tserruya

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Update on HBD R&D at the WIS Boris Khachaturov, Alexander Kozlov, Alexander Milov, Ilia Ravinovich and Itzhak Tserruya Weizmann Institute, Israel Feb. 12, 2002 • http://www.phenix.bnl.gov/WWW/p/draft/tserruya/HBD/1-12-R&D-update.ppt

  2. Rates and Yields • Luminosity 2 x 1026 cm-2 s-1 •  7.2 b • 10 weeks run 6.05 106 sec • RHIC and PHENIX efficiency 0.25 • dN/dy(o) per min. bias event 100 m=.2 - .5    • Y(e+e-) per o (pT > 200 MeV) 1.1 10-6 1.2 10-7 1.5 10-7 1.7 10-7 • Pair reconstruction efficiency 0.25 • Total yield (10 weeks run) 5.8 105 6300 7900 8900

  3. The setup. Set up: • Detector: double GEM (10x10cm2) + PCB • Cosmic trigger: 3 layer plastic scintillators + Cherenkov counter (in near future) Electric scheme • Two HV power supplies for more flexibility • Cathode readout Future: Cherenkov counter for high momentum muons (~min-1)

  4. “Electron” Trigger • Design almost complete • Manufacturing and order underway

  5. Cosmic ray signals in Ar/CO2 Ar/CO2 70-30 • VGEM = 450 V • E d = 2.0 kV cm –1 • E t = 4.0 kV cm –1 • E i = 4.5 kV cm –1 S. Bachman et al. NIM 438A (1999) 376 S. Bachman et al. NIM 438A (1999) 376 S. Bachman et al. NIM 438A (1999) 376 Gain: 4 x 104

  6. Status & plans: • Basic equipment to work with GEM is ready: • Cosmic trigger, sources • Electronics • Gas system • Missing: mass flow meters for gas mixture, monochromator • Double GEM detector is working at the WIS in Ar/CO2 • Gain 4.5·104 achieved and is consistent with measured at CERN • Trip rate under studies • Immediate plans: learn to operate GEM under known conditions: • Gain vs. VGEM • Gain vs. Etransfer , Einduction • Better front end electronics & box to reduce gain • Next step: move to CF4 • Gain, voltages, trip rates • Aging

More Related