Atsuhiko Ochi Kobe University 6, November 2012 ATLAS MicroMEGAS meeting

 Screen printing – MM has already been assembled with gas package. ◦ Readout : 1-Dimensional, 400um pitch ◦ Gas gap : ~ 100 um (estimated) ◦ Drift length : ~ 1cm  Operation test ◦ Gas: Ar:C2H6 (7:3) ◦ Signal of beta source (90Sr) were observed ◦ No HV current found (<10nA)  At first, in the burn-in stage, we found steady current of a few micro ampere. ◦ Estimated gain … a few thousand  Vstrip = +520V, Vdrift = -1kV ◦ We need to reduce the nise. 2012/11/6 A. Ochi, Kobe Univ.2

 Site of the test ◦ H6 test bench, using parasite beam  Schedule ◦ Because of administration work, we will be ready to enter the test beam site from 14 th November. ◦ We will check position/timing resolution for various voltages of strips and drift plane.  We will take a data for comparing to existing MMs. ◦ Estimated test term is one week  Maximum, 2 weeks. ◦ Ochi and Edo will join from Kobe. ◦ We need helps from test beam experts.  Materials to be need ◦ Readout: Two APV25 cards and their readout system ◦ HV supplies (Positive and Negative) ◦ Gas system 2012/11/6 A. Ochi, Kobe Univ.3