KTAG Mechanics, Optics and Cooling

Progress and Schedule

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KTAG Schedule for Technical Run

• Build stage-1 detector January 2012 to July 2012– Half detector (4 octants) [Incorporate improvements later]– 32-channel readout [Final design is 64]– Preliminary optics [defer cost and complexity]

• NA62 Detector Activities June – December 2012– DCS (Detector Control ) 15 – 30 June– Dry run and DAQ integration 15 – 31 July – Install KTAG & Integration August - September– Technical Run 12 October – 9 December– Data to understand beam backgrounds, finalise Mechanics &

Optical design and understanding of DAQ & Electronics for 2014

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Lightguide, PMTs, Electronics

Support cylinder bolted to CEDAR

Cooling block

Lens

Mirror

ATEX nitrogenEnclosure

Support Frame

Liverpool Design and FabricationDesign Fabrication– Support Tube In CERN awaiting work on CEDAR Nose– Light guide 1 Tooling and methodology complete

Cut and polish cones end of March

– Remaining 3 lightguides End of April (Mylar inserts mid May)– Complete Detector Framework Parts and brackets end of March– Optical support cylinder Completion end of April– ATEX-2 chamber & supports Completion end of April

– Lens & mirror mounts - March Outside company – April– Cooling assembly – April Completion end of May (in house)– Environmental Case & Frame

• Preliminary design of case – March Order materials & agree schedule end March

• Installation Frame – end March Completion end of May (in house)• Final design of case - mid April Delivery end May by outside company

– Lightguide & electronics box – AprilComponents (outside company) – MayNA62 CEDAR Meeting 26March2012 4

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Development Work

•Gluing conical inserts•Measuring reflectivity•Cooling and Chiller

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Gluing method• Standard aluminium surface preparation

– Degreasing– Abrading and removing loose particles or– Anodising with phosphoric acid

• Mylar mounting - vacuum pen development

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Reflectivity measurement

,0 /201 fxfxDD 2202 //1 fxfxDD

Variable – divergence lens system. The divergence angle θ increases as the positive element is moved toward the input by the distance x.

320 /5.0arctan2 fxD

G. A. Massey, Beam Diverging Lens System for High Power Laser Transmitters, Applied Optics, Vol. 11, Issue 12, pp. 2981_1-2981_1 (1972)

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(small-angles)

fDMAX /0 fDMAX /0

100/1/0 fDMAX9

Draft Chiller Requirements (March 2011)

T rise 0.5deg C 0.25deg C 0.10 deg C

Bore 4mm 6mm 8mm 4mm 6mm 8mm 4mm 6mm 8mm

Flow 3.09 3.09 3.09 6.17 6.17 6.17 15.43 15.43 15.43

Pressure 3.52 0.55 0.17 11.8 1.83 0.57 58.8 9.13 2.83

• Tabulate Flow and pressure for different bores of the internal pipe work and desired temperature rise

• Chiller Specifications (preliminary web-trawl)

Model Power Flow (lpm @ 0 bar) Pressure (bar)Fryka DLK 402 380W @ 30C 4 0.15Grant RC350G 350W @ 20C 15 1.60 (@1 lpm)Neslab Thermoflex 900/P2 900W @ 40C 12.5 (@4.1 bar) 7 barJubalo FC600S 600W @ 20C 15 1.2Cole-parmer WU-13042-07 250W @ 20C 21 0.8Lauda WK 502 600W @ 20C 10 (@1.5bar) 2.2

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Thermo-Scientific (NESLAB)

• Two product lines– ThermoFlex (5 models: 0.75kW to 4.4kW)

• ‘newer’• 5C to 40C• P2 pump gives 12.5lpm @ 4.1b• Eg. ThermoFlex 1400 (1170W) = £3,773 + VAT (28 days)

– Merlin (5 models: 0.74kW to 4.8kW)• ‘older’ – only some models now available• -15C to 25C• P2 pump gives 9.5lpm @ 4.2b• Eg. M33 (1142W) = £4241+VAT (35days)

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The Small Print...• Auto-restart

– Both can be configure to re-start if mains power is interrupted.

• Communications (optional?)– RS232/485

• I/O (optional?)– Merlin: 12/24V remote start/stop + external RTD– ThermoFlex: 15-pin I/O connector

• Relays for: low level, pump on/off, low flow + 2 configurable• Remote start/stop• 10mV/deg C analogue output of temperature• 10mV/deg C remote set point (eg 200mV=20deg C) 12NA62 CEDAR Meeting 26March2012

Liverpool Assembly & Testing

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Assembly Frame with Support Tube

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Lightguide, PMTs, Electronics

Support cylinder bolted to CEDAR

Cooling block

Lens

Mirror

ATEX nitrogenEnclosure

Support Frame

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Environmental Cover

• Light-tight• Thermally insulated• Faraday cage• Fire resistant

Liverpool Assembly• Assembly Frame with Support Cylinder Complete• Detector Support Frame (2 halves) End April• ATEX enclosure and Mirror mounts Early May• Lightguides and PMT housings (1 half) Mid May• Electronics & Octant wiring (1 half) End May• Cooling panels, chiller & PT100’s Early June• Cabling and patch panels (1 half) Mid June• Environmental Enclosure (2 halves) Mid June• Mechanical installation test End June• External cabling to EE patch panel Early July• Temporary LED system and System test July• Pack and ship to CERN End July

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UK Goals for Technical Run• K+ Identification: measurement of efficiency for K and π

– Measure normalisation: Actual light/MC light– Measure shape & distribution of light spot – compare with MC

• Thermal Environment– Measure temperature and temperature gradient– Establish operating parameters for Chiller

• Assess effectiveness of Monitoring & LED systems• Electronics

– PMT rates, saturation, cross talk, time resolution– Trigger, DAQ, links to central control– CEDAR motor control and display

• Beam measurement programmeNA62 CEDAR Meeting 26March2012 18