Large-Area GEM Detector Development at CMS, RD51, and Fl. Tech – A brief overview – Marcus Hohlmann Florida Institute of Technology, Melbourne, FL PHENIX tracking upgrade workshop - BNL, Dec 15, 2010
Large-Area GEM Detector
Development
at CMS, RD51, and Fl. Tech
– A brief overview –
Marcus Hohlmann
Florida Institute of Technology, Melbourne, FL
PHENIX tracking upgrade workshop - BNL, Dec 15, 2010
Overview
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 2
• Detector prototype development at CMS
• Production techniques for large-area GEM detectors at Fl. Tech
• RD51 Scalable Readout System for MPGDs
Potential CMS high- upgrade
Potential muon upgrade
at ||>1.6 with GEMs
for triggering & trackingDec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 3
A. Sharma, S. Colafranceschi
~1m
Triple-GEM
Prototype
Large Triple-GEM prototype
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 4
Shielding
Readout(PCB w/ strips)
Frame
GEM Foil
HV divider
Drift plane
Al frame with gas distrib. grooves
Openings for VFAT electronics
Spacers
3 mm Al base plateA. Sharma, S. Colafranceschi
Largest GEM detector
built to-date (CERN):
Single-mask GEM foils
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 5
6 sectors7 sectors
9 sectors13 sectors
35 HV sectors per GEM foil with area of ~100 cm2 each.
Single-mask GEM cross section
Single mask GEM foil with spacer frame at CERN(active area: 990 mm long & 22-45.5 mm wide)
TOP
TOP
TOP BOTTOM
BOTTOM
BOTTOM
Single-mask technology is required for large-area GEM foil production.
Recent quality of these foils equals standard double-
mask GEMs.
Examples of GEM hole quality
A. Sharma, S. Colafranceschi
Beam Test of Large-Area GEM
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 6
12000.00
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00
2350
.00
3280
.00
2350
.00
3880
.00
2320
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000.
00
980.
00
920.002050.00
1140.002740.00 1860.00 2520.00
840.00
4440
.00
4700
.00
4880
.00
4600
.00
4510
.00
185.00
4650
.00
4800
.00
FRAME
Scintillators 1 & 2(Upstream)
G1 – Tracker
GEM
G2 – Single Mask Triple
GEM G3 – Tracker GEM
G4 – Timing GEM
G5 – Tracker GEM
Scintillator 3 - downstream
Beam Direction – from left to right direction
18-28 October 2010: Successful / Beam Test at RD51/H4 (CERN SPS)
Tracking telescope
A. Sharma, S. Colafranceschi
Detector performed well.
Data analysis ongoing.
Fl. Tech GEM stretching technique
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 7
Cost-effective GEM foil thermal stretching technique via infrared heating under clean room conditions in our high-bay lab
(RD51 Technical Note in preparation)
along long side of frame
Works
well !
Infrared lamps
Detectors with IR-stretched GEM foils
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 8Sep 30, 2010 8
Eight detectors built at CERN using oven(30cm 30cm active area)
Transfer of know-how from CERN
Two 30cm × 30cm detectors built at Fl. Tech
using IR stretching method:
Both
detectors
working
mips8 keV
X-rays
Readout Electronics & DAQ
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 9
Florida Tech SRS application:
• Commercial production of ~160 APV25 hybrids
• DAQ software development
• Event monitoring
• First demonstration of chain APV+SRS+DATE+AMORE
• First integration of SRS with 30cm×30cm GEM detectors
• Largest user of SRS to-date (~15k ch.)
RD51 coll. is developing a common Scalable Readout System for MPGD’s
9
APV25 or
VFAT or
BNL ATLAS
Hybrid here .
Hans Müller
Sorin Martoiu
(CERN)
• from few 100 to ~105 channels
• full hardware chain tested by now
X-Strip Cluster
Y-Strip Cluster
Full readout of 3030cm2 detector w/ 1500 strips
Available Facilities at Fl. Tech
Dec 15, 2010 M. Hohlmann – PHENIX tracking upgrade workshop 10
•Production & Testing– Medium-size clean room for prod. (~ cl. 1,000)
– Small clean room for R&D (~ class 10,000)
– Laminar flow hood for R&D (~ class 100)
– Space in 350 m2 high-bay area for test stands
– Gas detector lab (HV, gas supply &
monitoring, 10 Gs LeCroy scope)
– Construction materials (e.g. glues, coatings)
•Readout & DAQ – Spare SRS r/o components in production for R&D work
– Dual SRS use (20,000 ch.) for existing 30cm×30cm GEMs and
for future R&D (PHENIX?) anticipated
– DAQ & monitoring software for SRS currently under development
High-Bay
experimental area
Thank you for your time!