NPS mechanical design 11/13/2018 Jlab meeting

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Presentation transcript:

NPS mechanical design 11/13/2018 Jlab meeting Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud 11 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

General view Lifting frame Mike Fowler structure design Black box Base with rails

General view structure design + calorimeter Calorimeter

General view structure design + calorimeter + connectic PCB cards and cables

Calorimeter 36 raws of 30 crystals =1080 crystals 0,5 x 20,5 x 200 mm Pitch between 2 crystals = 21,35 mm in each direction (gap between 2 crystals = 0,8mm Each crystal is wrapped of reflective sheet on each side except the back side toward the PMt (Reflecteurs, Enhanced Specular Reflector 3M S+ESR 65µ thickness) Cooling copper plates around the calorimeter + insulation with Depron in order to maintain the T° @ 18°=/- 0,1 °(Study in progress)

Calorimeter support Spacers and threaded rods between the 2 frames Back side alveoles (20 mm width) Aluminum frame (20 mm width) Front side alveoles (20 mm width)

Calorimeter support: Back side alveoles details Reference Aluminum plate (on which are fixed the PMts) Carbon plates 0,5 mm thickness crossed Carbon plates glued on the ref. plate

Calorimeter support: Front side alveoles details Carbon plates 0,5 mm thickness crossed Blocking plastic parts for an axial maintain of the crystals Insert plastic part inside each alveole (after insertion of the crystal)

PMt assembly Copper plate for cooling Optic fiber for monitoring and curing Mu metal shielding PMt PCB

PMt and crystal assembly cut view Optic fiber for monitoring and curing

Cables , PCB cards and connectors 5 Cables for HT ,signal and ground Optic fiber for monitoring and curing 1 Pcb card per column 800 x 230 x1,6 mm

Cables , PCB cards and connectors 3 HV connectors 5 Cables for HT ,signal and ground /chanel Sma connector Optic fiber for monitoring and curing Detail : 1 LED/channel connected to optic fiber LED connector Translation system

Cables , PCB cards Translation Slide the PCB in order to permit the acces to the PMTs 25 cm seems ok : test in orsay with a moke up

Thermical aspect Intermediate Zone : Thermical Resistance Crystals Zone : @ 18°+/-0,1° Heating Zone : 500mW/channel = 540 W Intermediate Zone : Made of Glass , Vacuum (PMt) Depron (Thermal insulator) External Zone : T°?

Thermical aspect: Crystal zone Crystals Zone : @ 18°+/-0,1° Copper plate with cooling system Depron: thermal insulator

Thermical aspect: Heating zone Copper plate with cooling system Copper for Heating conduction (via gap pad)

Thermical aspect: Heating zone

Thermical aspect: Heating zone Refroidissement interne 18° 500mWatts sur une plaque en cuivre Plaque froide à 18°

Thermical aspect: Copper plate 10 mm thickness cooling 500mWatts applied on each PMt zone This approximative calculation show the difficulty to cool the plate in the center

Thermical aspect: Copper plate 20 mm thickness cooling 500mWatts applied on each PMt zone This model show an improvement for T° but difficulty to cool the center