Screen printing MM test,current status and plans

Atsuhiko OchiKobe 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.

2012/11/6A. Ochi, Kobe Univ. 2

Status of chamber preparation

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 14th 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

2012/11/6A. Ochi, Kobe Univ. 3

Test plan at CERN