chanti status
DESCRIPTION
CHANTI status. CHANTI team. CHANTI TR setup. Outside the beam next to LAV1 Inside a vacuum capable tank which has been emptied in 29th November Using LAV signal flange to set V bias and read signals from the station inside the tank. 1. CHANTI TR DCS/ Readout. Beam OFF. Beam ON. - PowerPoint PPT PresentationTRANSCRIPT
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI status
CHANTI team
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI TR setup• Outside the beam next to LAV1• Inside a vacuum capable tank which has
been emptied in 29th November• Using LAV signal flange to set Vbias and
read signals from the station inside the tank
1
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI TR DCS/ Readout• Standalone DCS using a laptop with serial communication and LabView to
drive CHANTI prototype board and serial comm to LAV-ToT board • Only 32 out of 46 ch can be powered and read simultaneously. • 1 TEL62 + 1 TDCB (64 ch, high and low th)
Beam OFF
Beam ON
2
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI TR setup
Only 32 CHANTI channels, corresponding to 64 TDC channels, can be instrumented using prototype board. Three possible configuration A-B A-C B-C but only two used: A-C B-C
3
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI Setup
4
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI B-C Setup
4
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI A-C Setup
4
Paolo Massarotti Photon Veto WG 11/12/12
CHANTI standalone acquisition• Very simple scripts with both .txt and .root output created by D. Di Filippo, M.Mirra
and F.A.• Always matches well the start of burst• Able to collect about 600 CHANTI evts/burst. • Acquisition limited to first ≃100 ms of the burst due to filling up of the buffer• «Event» is defined offline since it is acquired triggerless
BEAM ONBEAM OFF
5
Paolo Massarotti Photon Veto WG 11/12/12
Occupancy• 64 electronic channels , with alternating Low/High thresholds
(=80/250 mV) corresponding to 32 physical channels. Occupancy coherent with the type of bar used.
Long bars
Medium bars
Short bars«Noisy» bar
6
Paolo Massarotti Photon Veto WG 11/12/12
Time slewingEvents with hits from both thresholds used to find average time slewing correction using logarithmic fit
7
Paolo Massarotti Photon Veto WG 11/12/12
Time resolution (1)• Events with more than one bar fired used for evaluating time
difference to estimate time resolution. Both without slewing correction
Trailing only hits have been dropped
8
Paolo Massarotti Photon Veto WG 11/12/12
Time resolution (2)• And with slewing corrections. • RMS 2.17 ns means about 1.3 ns single channel resolution. • No XY correction applied yet • Expect 4 channels will be actually fired by a MIP
9
Paolo Massarotti Photon Veto WG 11/12/12
Time resolution (2 bis)• And with slewing corrections. • RMS 2.17 ns means about 1.3 ns single channel resolution. • No XY correction applied yet • Expect 4 channels will be actually fired by a MIP
9
Paolo Massarotti Photon Veto WG 11/12/12
ToT response• Due to triangular shape of the bars adjacent bars should show
anticorrelated response (i.e. anticorrelated ToT at same threshold)
10
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
Station ID
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
Ring ID Vertical = 1Horizontal = 2
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
If it’s a half bar up (right) = 0, down (left) = 1
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
Channel ID in the Ring (between 0 to 16)
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
Threshold Low = 1High = 2
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
Channel recodification: 1 2 1 0 8 1
Station ID
Ring ID Vertical = 1Horizontal = 2
If it’s a half bar up (right) = 0, down (left) = 1
Channel ID in the Ring (between 0 to 16)
Threshold Low = 1High = 2
11
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisition
N hits
N hits
Ring occupancy for the different rings:X Ring and Y Ring
12
Paolo Massarotti Photon Veto WG 11/12/12
Common acquisitionPosition in the Ring (1 X, 2 Y)
X (mm)
Y (mm)
Hole
Hole
13
Paolo Massarotti Photon Veto WG 11/12/12
Vacuum Test• Al least 10-4 mbar immediately reached and no changes in the currents. Now al
least 10-5 mbar reached. In the next days a outgassing test planned
14
Paolo Massarotti Photon Veto WG 11/12/12
Conclusion• Acquired data with the A-C and B-C configuration in both standalone mode and
common acq
• Acquired data with different thresholds (more than 100k events for each configuration) both in standalone acq and in common acq
• Acquired data different Vbias (nominal Vbias ± 250 mv and 500 mv)
• Tested the detector operation and response in vacuum
• Good response from the prototype board
• We have to analyse data collected using both the acquisitions
15
Paolo Massarotti Photon Veto WG 11/12/12
Construction status• Bars for three station have been already tested
• CHANTI Vessel design ready
• As soon as possible there will be a meeting in Frascati in order to discuss of the CHANTI board finalization
16