recap clamp for mutr station-3
DESCRIPTION
Recap Clamp for MuTr Station-3. Itaru Nakagawa For the PHENIX Muon Trigger Upgrade Collaboration. Especially credit to: Tsutomu Mibe (KEK) Yoshinori Fukao (RIKEN) Yoshimitsu Imazu (RIKEN) Kentaro Watanabe ( Rikkyo ). MuTr Cross Talk. HV (1800 V). - PowerPoint PPT PresentationTRANSCRIPT
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Recap Clamp for MuTr Station-3
Itaru NakagawaFor the PHENIX Muon Trigger
Upgrade CollaborationEspecially credit to:Tsutomu Mibe (KEK)Yoshinori Fukao (RIKEN)Yoshimitsu Imazu (RIKEN)Kentaro Watanabe (Rikkyo)
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MuTr Cross Talk
HV (1800 V)
1 MWAnode wire
1 MW
100 pF ....
Cathode strips (96 strip)
~0.1 pF/strip
Rise time of anode signal ~ 10 nsec
Removed to reduce HV trips
Anode Readout
100mV
3V
Serious Issue for Big Pulse
Pointed out by Tsutomu Mibe@KEK
Decap
Doesn’t exist.
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SolutionHV (1800 V)
1 MWAnode wire
100 pF ....
Cathode strips (96 strip)
~0.1 pF/strip
Rise time of anode signal ~ 10 nsec
R<<1M W1 MW
Additional Circuit to let anode current escape to ground.
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Pads for surface mount capacitorsLeft over Solder + Coating
To Anode Wire
MuTr Station-3 Anode Card
Capacitor (Removed)
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North Station-3 Anode Gap
25mm28mm
Geometrical Constraint
Anode cards are only accessible from their back. Front pattern can only be visible using an inspection mirror.
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Mounting A Clamp on Anode Card
Probe
Gap-1 Station-3 Anode Card
Screw
Station-3 Chamber
Capacitor
Pad
Gap-2 Station-3 Anode Card
28mm
MuID SideIP side
Anode card
Clamp
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Recap Clamp Prototypes
半田の残りかす(C) ShinEtsu Rubber Co.: EC-BM300 (2.5Wcm)
(A) 4 pin probes
(B) single pin probe
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Advantage/Disadvantage of Different Prototypes
Advantage
Disadvantage
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Effect of Recap
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Test Bench Setup
90Sr Source
Anode wire
Strip
#22
w/ and w/o Clamp
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Comparison w/ .vs w/o Terminator
22
27
17
Trigger
w/o Clamp
Strip#
22
27
17
w/ Clamp w/ Clamp
Trigger
w/o Clamp
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Comparison w/ .vs w/o Clamp
w/o Clamp
With Clamp
Strip Number
Aver
age
ADC
[cha
nnel
]Conductive Rubber
12
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Towards Successful Installation
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14Fiber Scope
Alignment
Spacer determines Transversedirection within ~ 300mm.
Possible misalignment can be found by visual inspection using a fiber scope
Fiber scope shot
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Electrical Contact
Readout socket
Readout BoardElectrical Contact will be confirmedby measuring Voltage using temporaryreadout tool.
To be removed after the measurement.
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Clamp Coating Max Current Average Current
w/o w/ <1uA <1uA
w/ w/o >100uA Tripped after 2 min.
w/ w/ 1uA 1uA
w/ w/o >100uA Tripped after 1min.
w/ w/ 2uA 2uA
Extreme Breathing TestHV=1900VDuration 2min
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Installation Proposal
To be installed North Bottom Octants
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Summary
• We have developed prototype clamps for re-capacitation to MuTr St-3.
• Good Contact was established more than 90% channels with present design in North MuTr.
• We propose to install 3 different prototypes (each 20) to North bottom Octants for Run11.
• They can be uninstalled during Run if they cause trouble in HV operation.
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Backup Slides
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ADC
MIP
MIP
Event Display of ADC Distribution
Strip
Gap 1Stereo
Gap 2Stereo
Gap 3Stereo
Gap 1NonStereo
Gap 2NonStereo
Gap 3NonStereo