Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 11
THGEM:THGEM: PROTOTYPE PROTOTYPE DEVICEDEVICE
Design of the first prototype
Production of THGEM foils
The prototype assembly
Tests in the laboratory
Test in the COMPASS beam
Fulvio Tessarotto
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 22
Drawings of the first Drawings of the first prototypeprototype
We started from the design of the prototype structure andthe mechanics of its test box
The prototype test box contains:a quartz radiator
a wire cathode framethe THGEMs and spacer framesa segmented collection anode pcb
We hope to perform the test of the first prototype using muons of the COMPASS beam or halo and a quartz radiator to generate Cherenkov photons.
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 33
THE PROTOTYPE THE PROTOTYPE STRUCTURE STRUCTURE
wireswires
11stst THGEM (CsI THGEM (CsI here,external here,external face)face)
22ndnd THGEM THGEM
collection anodecollection anode
apertures for gas apertures for gas circulationcirculation
read-outread-out
Quartz radiator(truncated cone)
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 44
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Photon DetectorsPhoton Detectors
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 1616
THGEM production for the THGEM production for the prototypeprototype
following the preliminary indications coming from the laboratory tests, the geometrical parameters of our first
THGEM prototype have been defined:
Thickness: 0.20 mm
Holes diameter: 0.20 mm
Pitch: 0.50 mm
Material: fiberglass + 17 μm thick Cu
Active area: 10 cm х 10 cm
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 1717
Raw material
CNC drilling
Electrodes etching
Rim if needed
Resist covering
THGEM production process
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 1818
10 cm x 10 cm THGEM
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 1919
THGEM: HV connections
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2020
THGEM: edge and holes
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2121
THGEM: edge and holes
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2222
THGEM: edge and holes
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2323
THGEM: holes
0.2 mm
0.5 mm
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2424
Anode with 256 padsAnode with 256 pads
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2525
Anode pcb, connector Anode pcb, connector sideside
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2626
Anode pcb, glued on Anode pcb, glued on Al frameAl frame
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2727
Anode pcb, glued on Al frame, with smd
connectors
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2828
Read-out for the initial Read-out for the initial tests:tests:
as for the MAPMTsas for the MAPMTs
Replacing the cover with Replacing the cover with the quartz radiator with a the quartz radiator with a mylar/aclar foil: test the mylar/aclar foil: test the device as ionizing particle device as ionizing particle detectordetector
Initial test configurationInitial test configuration
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 2929
PLANNINGPLANNING
Lab tests, no CsILab tests, no CsI Beam tests, no CsIBeam tests, no CsI
Trigger prepared in 888, at the end of the hall, to trigger on halo (or beam) mu’s
If possible, apply CsI on the If possible, apply CsI on the external surface of the first external surface of the first THGEM THGEM
Test with quartz radiator !Test with quartz radiator !
Fulvio TESSAROTTO CERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH sessionCERN, 14/09/2007 - COMPASS Collaboration Meeting - RICH session 3030
A. Braem CsI A. Braem CsI evaporation plantevaporation plant