Stanford, Mar 21, 2005 P. Colas - Microme gas TPC 1 Results from a Micromegas Results from a Micromegas TPC Cosmic Ray Test TPC Cosmic Ray Test Berkeley-Orsay-Saclay Progress Report Berkeley-Orsay-Saclay Progress Report • Reminder: the Berkeley- Reminder: the Berkeley- Orsay-Saclay cosmic setup Orsay-Saclay cosmic setup • News since the Paris News since the Paris LCWS04 : cosmic ray data LCWS04 : cosmic ray data taking taking • Preliminary results Preliminary results • First MC studies First MC studies • Future plans Future plans P. Colas 5 , I. Giomataris 5 , V. Lepeltier 4 , M. Ronan 1 , K. Sachs 2 , T. Zerguerras 3 1) LBNL Berkeley, 2) Carleton Univ., 3) IPN Orsay, 4) LAL Orsay, 5) DAPNIA Saclay 2005 LC WORKSHOP
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Stanford, Mar 21, 2005P. Colas - Micromegas TPC1 Results from a Micromegas TPC Cosmic Ray Test Berkeley-Orsay-Saclay Progress Report Reminder: the Berkeley-Orsay-
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Stanford, Mar 21, 2005 P. Colas - Micromegas TPC 1
Results from a Micromegas TPC Results from a Micromegas TPC Cosmic Ray TestCosmic Ray Test
Stanford, Mar 21, 2005 P. Colas - Micromegas TPC 2
Berkeley Saclay Orsay
Chamber diameter 50 cm length 50 cm
Copper mesh
50 m pitch
50 m gap
The setupThe setupThe setupThe setup
DAQ speaded up by a factor 20 in May 2004
Trigger improved : 20/min 67% eff.
2T magnet at Saclay
Stanford, Mar 21, 2005 P. Colas - Micromegas TPC 3
Online event display Rows 4 & 5
(software from D. Karlen, adapted by M.Ronan)
Stanford, Mar 21, 2005 P. Colas - Micromegas TPC 4
Data150 000 cosmic tracks recorded at magnetic fields of 0.1, 0.3, 0.5, 0.7, 1, 1.5 & 2 teslawith Ar-CF4:3%, Ar-CH4:10%(P10), Ar-Isobutane:5% and some TDR gas data.
Trigger simulation shows good understanding of angular distribution.
Stanford, Mar 21, 2005 P. Colas - Micromegas TPC 5