JLab meeting Unité mixte de recherche CNRSIN2P3 Université ParisSud 11 91406 Orsay cedex Tél 33 1 69 15 73 40 Fax 33 1 69 15 64 70 httpipnwebin2p3fr Design presentation General front ID: 1045921
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1. NPS mechanical design 02/03/2020 JLab meetingUnité mixte de recherche CNRS-IN2P3Université Paris-Sud 1191406 Orsay cedexTél. : +33 1 69 15 73 40Fax : +33 1 69 15 64 70http://ipnweb.in2p3.fr
2. Design presentation
3. General front Axio viewCalorimeter
4. Calorimeter 36 x 30 PbWO4 crystals
5. Calorimeter: crystal supports
6. Calorimeter crystals cut viewPMT HV dividerPMT support plateReference plate
7. Magnetic shieldingYellow : 10mm iron @ 40mm from top and bottom crystals and @ 35mm from each side crytalsPurple : 1,5 mm mu-metal on the edgeGrey : 0,5 mm mu-metal between each crystal27,5 mm30 mm40 mm150 mm120 mmPMT front0,1 mm thickness mu metal tube
8. Cooling2 Heat exchangers @ top + bottom2 Chillers1 for front cooling1 for eletronic cooling4 copper plates2 Aluminum plates cooled @ the edge
9. Cooling and crystal temperature sensorsFoam Refrigerated Copper plate Aluminum plate for heat conduction close the crystalsShielding63 PT 100 sensors @ the back side of the crystals +63 @ the front side (see below)Mu-metal mesh (crystal hidden)63PT 100@ the front sidethrough the PEHD plate
10. General back axo view30 Interface PCB and cablesCan be moved for PMT maintenanceCosmic Scintillator @Top and Bottom(final design:2 PMT/paddle)
11. PMT block assembly into the aluminum plateAll mu-metal tube gluedAll parts ready to be assembled
12. PMT blocks mounted on aluminum plate Mounting Test on plate ok
13. Wrapping crystals
14. Crystal wrapping (VM2000)Total vertical wrapping thickness = 260 µ (2x70 + 2x60) Total horizontal wrapping thickness = 260µ (2x70 + 2x60) To avoid optical crosstalk we will add a sheet of tedlar around each crystal between the alveolis (schematic reprentation on my slide)
15. Front reflective sheet (VM2000) Front reflective sheet sticked on the plastic block part
16. Fiber tests and assembly
17. Fiber side crystalSilicon Cable gland in order to block the fiberMetal ferrule screwded in aluminum supportFiber : contact with crystalOptical Grease will be tested for efficiency
18. Fiber side PCB inserted and no glued in the plastic Ferrule Pinched between 2 aluminum platesProtected with plastic tube Advantage:1) The fibers can be dismounted if necessary2) The PCB can be dismounted separately if necessary without disconnecting the fiber from the crystal Length fiber = 51cm (has to be adjusted with the PCB prototype)
19. *Box and its accessories (Plastic plates, foam…)*PCBs and their accessories (connectors, mechanical parts)*Cables*Reference plate and PMT support plates *All parts for PMT blocks*Optical fibers and their accessories*2 Heat exchangers*2 Chillers*Carbon honeycomb*Reflective sheets (VM2000)*Tape*Connectors and tubes for cooling*Screws*Cosmic scintillators*Calorimeter support frame*Temperature sensors and their control boxesManufactured parts and received in OrsayParts ordered & awaiting delivery*Frames for honeycomb (mid February)*Cool plates (mid February)*Bottom box Plate (mid February)Parts to be ordered (slight delay due to recent magnetic shielding modification)*4 additional frames for honeycomb (design ready, quote requested) *Mu-metal mesh (design ready and quote received)*Iron shielding (design ready and quote for heat treatment , quote for manufacturing in progress)*Additional aluminum plates for cooling (will be made in our workshop)*Aluminum supports for cold plate (quote in progress)*1080 spacers 24,5 mm length between crystals and reference plate (No quote at the moment)Expected delivery of all parts to JLab by August 2020Status of different partsList of assembly tasks after delivery to JLab to be discussed this afternoon