Test X5/GIF: Status Report Manuela Cirilli

Pavia, 30 settembre 2002Manuela CirilliX5/2 X5/GIF Test Beam 2 weeks of data taking: 2 weeks of data taking: May 27 – June 3 (Main users) June (Parasitic with Alice Dimuon Trigger) Participants: Participants: Roma:Antonio Di Domenico Claudio Luci Ludovico Pontecorvo Manuela Cirilli CERN: Claus Cernoch Stephanie Zimmermann 2 weeks of data taking: 2 weeks of data taking: May 27 – June 3 (Main users) June (Parasitic with Alice Dimuon Trigger) Participants: Participants: Roma:Antonio Di Domenico Claudio Luci Ludovico Pontecorvo Manuela Cirilli CERN: Claus Cernoch Stephanie Zimmermann

Pavia, 30 settembre 2002Manuela CirilliX5/3 X5/GIF Set-up Experimental Area : Experimental Area : Muon beam Cs source of ~700 GBq, 662 keV, absorbers to tune source intensity Detectors: Detectors: BIS module 0 Bundle Read-out & DAQ: Read-out & DAQ: Mezzanines + adapter + repeater + CSM MiniDAQ (Win95) DCS: DCS: BridgeView (Win2000) Experimental Area : Experimental Area : Muon beam Cs source of ~700 GBq, 662 keV, absorbers to tune source intensity Detectors: Detectors: BIS module 0 Bundle Read-out & DAQ: Read-out & DAQ: Mezzanines + adapter + repeater + CSM MiniDAQ (Win95) DCS: DCS: BridgeView (Win2000)

Pavia, 30 settembre 2002Manuela CirilliX5/4 Detectors BIS module 0: BIS module 0: 170cm 30 tubes X 4 layers X 2 ml parallel gas distribution Bundle: Bundle: 280cm 6 tubes X 4 layers (1 layer disconnected from gas and HV due to a broken wire) serial gas distribution (6 tubes in series) BIS module 0: BIS module 0: 170cm 30 tubes X 4 layers X 2 ml parallel gas distribution Bundle: Bundle: 280cm 6 tubes X 4 layers (1 layer disconnected from gas and HV due to a broken wire) serial gas distribution (6 tubes in series) BIS BUNDLE

Pavia, 30 settembre 2002Manuela CirilliX5/5 Experimental Area Gas area

Pavia, 30 settembre 2002Manuela CirilliX5/6 Gas distribution Bundle OUT BIS IN ML1ML2 Pressure Controller (w.r.t. P atm ) Bundle IN Rotameter Pressure Controller (absolute P) Water and Oxygen content monitored BISOUT ML2 ML1 Premixed ArCo 2

Pavia, 30 settembre 2002Manuela CirilliX5/7 Operating conditions / 1 No gas circulation on BIS: No gas circulation on BIS: too much pick-up noise: ~10 kHz on most tubes < 2 Hz without circulation Stainless steel pipes Stainless steel pipes BIS operating conditions: BIS operating conditions: 1 volume/day oxygen < 15 ppm, water ~ ppm Bundle: Bundle: 2.4 l/h 0.5 volume/day (~ 2.4 l/h) leaking ~ 100 X Atlas specs No gas circulation on BIS: No gas circulation on BIS: too much pick-up noise: ~10 kHz on most tubes < 2 Hz without circulation Stainless steel pipes Stainless steel pipes BIS operating conditions: BIS operating conditions: 1 volume/day oxygen < 15 ppm, water ~ ppm Bundle: Bundle: 2.4 l/h 0.5 volume/day (~ 2.4 l/h) leaking ~ 100 X Atlas specs

Pavia, 30 settembre 2002Manuela CirilliX5/8 Operating conditions / 2 Nominal HV and threshold : Nominal HV and threshold (except special scans): HV= 3080 V separate HV system for BIS and Bundle thresh=114 T monitored with 12 PT100s: T monitored with 12 PT100s: ˚ fluctuation over the whole run period: ˚ Temperature correction needet Bundle 3 bar w.r.t. P atm : Bundle 3 bar w.r.t. P atm : P atm monitored thanks to the DCS of the Rome2 RPC set-up Nominal HV and threshold : Nominal HV and threshold (except special scans): HV= 3080 V separate HV system for BIS and Bundle thresh=114 T monitored with 12 PT100s: T monitored with 12 PT100s: ˚ fluctuation over the whole run period: ˚ Temperature correction needet Bundle 3 bar w.r.t. P atm : Bundle 3 bar w.r.t. P atm : P atm monitored thanks to the DCS of the Rome2 RPC set-up

Pavia, 30 settembre 2002Manuela CirilliX5/9 Electronics & DAQ BIS: BIS: 5 mezzanines on each multilayer ADCs for pulse height studies Bundle: Bundle: 1 mezzanine DAQ rates: DAQ rates: from ~150 Hz (ADC, full source intensity, local data storage) to ~450 Hz BIS: BIS: 5 mezzanines on each multilayer ADCs for pulse height studies Bundle: Bundle: 1 mezzanine DAQ rates: DAQ rates: from ~150 Hz (ADC, full source intensity, local data storage) to ~450 Hz disconnected layer

Pavia, 30 settembre 2002Manuela CirilliX5/10 Collected Data / M Evts collected: 43.7 M Evts collected: ~19 GB including random triggers for rate measurements and ADC calibration runs 32.7 M Evts with beam tracks 32.7 M Evts with beam tracks Data includes angular and HV scans at different Data includes angular and HV scans at different source intensities source intensities Tube rates: Tube rates: Absorption : nominal Atlas conditions (100 Hz/cm 2 ) Absorption 1 (full source intensity): Atlas with safety factor M Evts collected: 43.7 M Evts collected: ~19 GB including random triggers for rate measurements and ADC calibration runs 32.7 M Evts with beam tracks 32.7 M Evts with beam tracks Data includes angular and HV scans at different Data includes angular and HV scans at different source intensities source intensities Tube rates: Tube rates: Absorption : nominal Atlas conditions (100 Hz/cm 2 ) Absorption 1 (full source intensity): Atlas with safety factor 5

Pavia, 30 settembre 2002Manuela CirilliX5/11 Collected Data / 2

Pavia, 30 settembre 2002Manuela CirilliX5/12 Tube spectra at maximum rate Beam data (2h) Cosmics data (12h)

Pavia, 30 settembre 2002Manuela CirilliX5/13 Event display max rate

Pavia, 30 settembre 2002Manuela CirilliX5/14 Planned Analyses high rate high rate (BIS+Bundle) Ageing tests Ageing tests (Pulse height studies on BIS) Performance of pattern recognition algorithms Performance of pattern recognition high high rate (BIS+Bundle) Test of the serial gas high rate Test of the serial gas high rate (Bundle) Study of the max. drift time vs. tube position Easy (in principle) with source off Source on: Lots of bkg on the TDC spectrum: clean it using BIS as an external tracker At abs1, also distortion of the spectrum: unfolding high rate high rate (BIS+Bundle) Ageing tests Ageing tests (Pulse height studies on BIS) Performance of pattern recognition algorithms Performance of pattern recognition high high rate (BIS+Bundle) Test of the serial gas high rate Test of the serial gas high rate (Bundle) Study of the max. drift time vs. tube position Easy (in principle) with source off Source on: Lots of bkg on the TDC spectrum: clean it using BIS as an external tracker At abs1, also distortion of the spectrum: unfolding

Pavia, 30 settembre 2002Manuela CirilliX5/15 Study of T max vs. Tube in the Bundle Initial strategy: Initial strategy: Use only source off data Use only data taken in nominal conditions of gas pressure, HV, threshold Combine source off runs only when there were no runs with the source on in between Typical run: 500 M Evts All 6 tubes in a layer have reasonable statistics Initial strategy: Initial strategy: Use only source off data Use only data taken in nominal conditions of gas pressure, HV, threshold Combine source off runs only when there were no runs with the source on in between Typical run: 500 M Evts All 6 tubes in a layer have reasonable statistics

Pavia, 30 settembre 2002Manuela CirilliX5/16 Beam Profile ~40 cm disconnected layer broken wire Beam direction

Pavia, 30 settembre 2002Manuela CirilliX5/17 Typical Bundle spectrum & fit Counts

Pavia, 30 settembre 2002Manuela CirilliX5/18 Bundle Tmax vs. Tube Layer 2 Layer 3 Layer 4 Tube nb Tmax (ns) Tube nb Tmax (ns) Runs Runs on 28/05 on 28/05 Runs Runs on 28/05 on 28/05 broken wire noisy tube

Pavia, 30 settembre 2002Manuela CirilliX5/19 Problems / 1 Layer 1 Layer 3 Layer 4 Layer 2 Comparison with BIS: Comparison with BIS: Use the 6 tubes in the beam: m Bundle q BIS ML1 « BIS ML2 ~40 ns difference ~40 ns difference between the two between the two chambers! chambers! And this is not the And this is not the end of the story… end of the story… Comparison with BIS: Comparison with BIS: Use the 6 tubes in the beam: m Bundle q BIS ML1 « BIS ML2 ~40 ns difference ~40 ns difference between the two between the two chambers! chambers! And this is not the And this is not the end of the story… end of the story…

Pavia, 30 settembre 2002Manuela CirilliX5/20 Problems / 2 Layer 2 Layer 3 Layer 4 Tube nb Tmax (ns) Tube nb Tmax (ns) Bundle Tmax Bundle Tmax not constant not constant over time! over time! Bundle Tmax Bundle Tmax not constant not constant over time! over time! Runs Runs on 27/05 on 27/05 Runs Runs on 27/05 on 27/05

Pavia, 30 settembre 2002Manuela CirilliX5/21 Temperature effect Temperature effect Change in atmospheric pressure Change in atmospheric pressure Bad calibration of the pressure controller Bad calibration of the pressure controller Bad calibration of the HV module Bad calibration of the HV module Source intensity during the previous run(s) Source intensity during the previous run(s) Temperature effect Temperature effect Change in atmospheric pressure Change in atmospheric pressure Bad calibration of the pressure controller Bad calibration of the pressure controller Bad calibration of the HV module Bad calibration of the HV module Source intensity during the previous run(s) Source intensity during the previous run(s) Possible reasons? T (˚C )T max (ns)T (˚C )T max (ns) Bundle P atm =971, previous abs = P atm =974, previous abs = 10 BIS ML BIS ML Bundle P atm =971, previous abs = P atm =983, previous abs = 2 BIS ML BIS ML Bundle P atm =973, previous abs = P atm =984, previous abs = 2 BIS ML BIS ML

Pavia, 30 settembre 2002Manuela CirilliX5/22 TDC spectra: BIS vs Bundle Counts Bundle BIS

Pavia, 30 settembre 2002Manuela CirilliX5/23 TDC spectra: Bundle vs. HV Counts HV=3180 HV=3280

Pavia, 30 settembre 2002Manuela CirilliX5/24 Conclusions Temperature effect Temperature effect Change in atmospheric pressure Change in atmospheric pressure Bad calibration of the pressure controller Bad calibration of the pressure controller Bad calibration of the HV module Bad calibration of the HV module Source intensity during the previous run(s) Source intensity during the previous run(s) Temperature effect Temperature effect Change in atmospheric pressure Change in atmospheric pressure Bad calibration of the pressure controller Bad calibration of the pressure controller Bad calibration of the HV module Bad calibration of the HV module Source intensity during the previous run(s) Source intensity during the previous run(s) Gas mixture? Gas mixture? Water contamination? Water contamination? Pressure drop on the capillaries? Pressure drop on the capillaries? Ruled out Whats left?