TGC-electronics commissioning before beam collision Y. Sugaya Osaka-U アトラス総会２００４ 12/23 河口湖

2004/12/ アトラス総会 2 Electronics commissioning concept ► TOF has been calculated, cable delay has been measured. ● Fine variable delay tuning (sub-nano step). ► Synchronization at early stage ● Easier tuning and reliable operation ● Coarse variable delay tuning (12.5 nsec step) ● Checking on test bench is effective ► One or a few parameters for Level 1 buffer depth and Beam crossing clock phase turning L1B BC clock High-pt board Sector Logic Star switch Slave board Patch panel ASD MuCTPI Synchronous 40 MHz beam crossing clock L1B

2004/12/ アトラス総会 3 Schedule Periodprogramitems during 2005 Mass production of electronics Bench testCrucial check of circuit performance From Feb commissioning of a 1/12 slice test pulse and cosmic-ray Fine delay including chamber response After installation, Nov. 2005: M1 2006: M2, M3 test pulseCoarse delay for synchronous circuits. Level 1 buffer depth Chambers are readyCosmic rayOverall check of up to now Trigger for other detector 2007 Single beam operation beam halo beam gas Overall check of up to now Bunch crossing clock phase Trigger for other detector

2004/12/ アトラス総会 4 Inspection of circuits using test bench ► Slice test using completed circuit (at KEK?) ► Validation of trigger performance ► Hardware simulation software is ready ● hit pattern trigger signal High-pt board Sector Logic Star switch Slave board Patch panel ASD BCID Software

2004/12/ アトラス総会 5 Trigger signal from TGC ► limited angle, only from vertex Low pt High pt Low pt High pt M1 M2 M3 Z (mm) R (mm) From Update of Technical Design Report, 09 June 2000

2004/12/ アトラス総会 6 On detector 1/12 slice test using test pulse and cosmic ray ► Assembling of 1/12 of TGC at building 180 ► Objective ● Final check of chamber and elec. before installation ● Fine delay value confirmation ► Remarks ● Angle of cosmic ray is limited for triggering ● Trigger board with FPGA High-pt board Star switch Slave board Patch panel ASD Trigger board

2004/12/ アトラス総会 7 TOF Test pulse run ► Pulse to ASD via Patch panel through variable delay ► Objectives ● Confirmation of Coarse delay value ● Level 1 buffer depth turning ► Remarks ● Simulate signal from particle ► Time of Flight ► Cable length correction High-pt board Sector Logic Star switch Slave board Patch panel ASD MuCTPI Synchronous Test Pulse L1B

2004/12/ アトラス総会 8 ~ 5 million cosmic muons enter the cavern enter the cavern in 15 minutes in 15 minutes upper hit lower hit Event Cosmic ray run ► Objectives ● Confirmation of delay values ● Chamber response to real particle ● Supply trigger for other detectors ► Remarks ● Mainly vertical flux ● TOF correction by delay should be reversed at upper side ATLAS Overview Week ATLAS Overview Week Saturday 02 October 2004 Pre-collision overview R McPhersonR McPherson Univ. of Victoria R McPherson

2004/12/ アトラス総会 9 Total  rate 105 kHz E  > 10 GeV 16 kHz E  > 100 GeV 1 kHz E  > 1 TeV 10 Hz L=10 34 Muons at cavern entrance E (GeV) Single beam run Beam halo muon Scattering of beam by residual gas Objectives ● Beam crossing clock phase tuning ● Overall check ● Provide trigger for other detectors Remarks ● Halo, only inner, TOF corr. reversed at upstream ● Gas, low pt. ATLAS Overview Week ATLAS Overview Week Saturday 02 October 2004 Pre-collision overview R McPhersonR McPherson Univ. of Victoria R McPherson

2004/12/ アトラス総会 10 Summary of Programs ► Run type, turning parameters Ratetiming L1B depth turning BC clock phase turning Trigger for other detectors From when 1/12 slice test goodfine delayNo assembling of 1/12 Test pulsegood Coarse delay yesNoyes cabling and low vol. Cosmic ray vertical mainly yes TOF corr. No yes TOF corr. HV on Beam halo inner mainly yes TOF corr. yes TOF corr. yes TOF corr. Single- beam Beam gas yes low pt yes Single- beam

2004/12/ アトラス総会 11 Summary ► Trigger performance check at bench test with hardware simulation software ► Timing parameter confirmation and tuning at commissioning stage, step by step ► Test pulse ► Cosmic ray ► Single beam; beam-halo and beam-gas ► Detector performance test by cosmic and single beam run ► Cosmic ray ► Single beam; beam-halo and beam-gas