1 / 11

TPC R&D status in Japan

TPC R&D status in Japan. Center for Nuclear Study, University of Tokyo. T. Isobe, H. Hamagaki, K. Ozawa, and M. Inuzuka. Contents. Development of a prototype TPC Basic Gas Test of pure CF4 Performance evaluation GEM development. 19, Nov., 2003. TPC/HBD Upgrade Working Group Meeting.

lizzettep
Download Presentation

TPC R&D status in Japan

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. TPC R&D status in Japan Center for Nuclear Study, University of Tokyo T. Isobe, H. Hamagaki, K. Ozawa, and M. Inuzuka Contents • Development of a prototype TPC • Basic Gas Test of pure CF4 • Performance evaluation • GEM development 19, Nov., 2003 TPC/HBD Upgrade Working Group Meeting

  2. Development of a prototype TPC Drift region -V • A prototype TPC • 30cm drift length, -30 kV HV • Readout from cathode pads • 20 mm anode wire • 13mm, 9.5mm, 6mm, 2.5mm pad • Designed as GEM can be mounted • Three holes for LASER input • Front End Electronics • Charge sensitive Pre-amp • 300MHz bandwidth • 100MHz 8bit FADC Drift 34cm Readout

  3. Gain 6*10^4 • 5.9 keV X-ray from 55Fe Gain test setup  CF4 needs much higher voltage to detect the suitable signals.

  4. 10cm/μsec @900V/cm/atm CF4 characteristics • Drift velocity and longitudinal diffusion were measured. • N2 LASER (λ=337nm) • Attenuated for single electron source • Input to 3 different positions • Gas condition • 20C,1 atm • H2O = 100ppm • O2= 30ppm 60μm Test system

  5. Performance of TPC Energy loss • Beam Test at KEK(Jun. 2003) • e,π,p,d beam (0.5-2.0GeV/c ) • readout with anode wire (no GEM readout) • Measurement Topics • Position resolution • 100μm resolution along the anode wire direction (2.5mm pad) • 500μm resolution in the drift direction • Double Track Separation • Double track could be identified, when the difference in distance between the tracks in the drift direction was more than 1.5cm • Particle Identification • Estimate that it is able to identify the electron with p < 80MeV/c • 5cm track length, 2 separation Schematic view of the beam test setup

  6. CERN Development of GEM • Two kinds of GEM are tested • GEM from CERN • Sauli group • Wet etching • 100 GΏ between both electrodes • GEM was made in Japan • Univ. of Tokyo and Fuchigami Co. • Plasma etching • 10 GΏ between both electrodes Fuchigami CO. Gain consistent with the results of CERN GEM P10 Ar-CO2 *10^3 Next  Plan to test GEM readout for TPC [V]

  7. Summary & Outlook • Achievements • A prototype TPC was developed. • CF4 characteristics was investigated. • 10cm/μsec drift velocity & 60μm longitudinal diffusion @E=900V/cm • Total performance of TPC with CF4 gas was investigated. • achieved 100μm resolution along the wire direction • GEM was developed using plasma etching method in Japan. • Outlook • Install the GEM as TPC readout • investigate the capability (next year) • Other types of readout pads • Improve the Front End Electronics • Applying for the high density signal (large band width)

  8. Additional slides

  9. CF4 signal • 110n second rise time • ~10 points to obtain the T0. • With 100MHz sampling

  10. Position Resolution 100μm Position resolution in the drift direction and along the anode wire were investigated as a function of drift length, pad size and input angle.

  11. Beam Test(2) Double Track Position resolution Along the wire 100μm Energy loss Drift direction 500μm 80MeV

More Related