KTAG Mechanics, Optics and Cooling Progress and Schedule NA62 CEDAR Meeting 3May20121

KTAG Schedule for Technical Run Build stage-1 detectorJanuary 2012 to July 2012 – Half detector (4 octants)[Incorporate improvements later] – 32-channel readout[Final design is 64] – Preliminary optics [defer cost and complexity] CEDAR ActivitiesMay – December 2012 – Dry run and DAQ integration15 – 31 July – Complete and test KTAG in UK31 July – Install KTAG & IntegrationAugust - September – Technical Run12 October – 9 December – Data to understand beam backgrounds, finalise Mechanics & Optical design and understanding of DAQ & Electronics for 2014 NA62 CEDAR Meeting 3May20122

3 Support cylinder bolted to CEDAR Cooling block Support Cylinder bolted to CEDAR flange Quartz lens 90 o spherical mirror Octant HV connectors ATEX nitrogen enclosure Detector frame Lightguide

Liverpool Design and Fabrication DesignFabrication – Support TubeInstalled on CEDAR Nose – Light guide 1Completed – Remaining 3 lightguides End of May – Detector FrameworkAssembled in Liverpool – Optical support cylinderCompletion end of May – ATEX-2 chamber & supportsCompletion immanent – Lens & mirror mountsOutside company – end of May – Cooling assembly – MayCompletion mid June (in house) – Environmental Case & Frame Materials arrive & cut at RohaSell25 th May -> 2 nd June Panels encased in aluminiumDelivery 15 th June Installation Frame Completion mid June – Lightguide & electronics boxComponents (outside company) – May – Integration of cooling & electronicsJune NA62 CEDAR Meeting 3May20124

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Development Work Gluing conical inserts Measuring reflectivity Cooling and Chiller NA62 CEDAR Meeting 3May20126

Gluing method Standard aluminium surface preparation – Removing loose particles – Degreasing – Polishing cone or fitting aluminised-mylar insert Mylar mounting - vacuum pen development NA62 CEDAR Meeting 3May2012 7

Gluing of aluminised mylar (update) Procedure Mylar covered (electrostatically) with protective layer of food-wrap, “sandwiched” in layers of 10 Conical inserts cut with the use of a template Degreased Al light guide cones covered with given amount of Araldite (gluing pen) Mylar inserted with a vacuum pen and hold with keeper till the epoxy cures Finished light guide stacked in the cabinet Handling procedure developed with the use of 3-D printer model and final Al material samples

Development Work Gluing conical inserts Measuring reflectivity Cooling and Chiller NA62 CEDAR Meeting 3May20129

Reflectivity measurement Variable – divergence lens system. The divergence angle θ increases as the positive element is moved toward the input by the distance x. G. A. Massey, Beam Diverging Lens System for High Power Laser Transmitters, Applied Optics, Vol. 11, Issue 12, pp. 2981_1-2981_1 (1972) NA62 CEDAR Meeting 3May2012 (small-angles) 10

Laser beam profile Laser beam profile: light intensity incident on the 18 [mm] cone composed of ~60% direct light within central 8[mm] diameter and in ~40% reflecting from the surface of aluminised mylar. In contradiction to a simple geometrical expectation of direct light. distance [mm] Photo current [μA] Beam profile will be re-measured using CCD camera + adequate software

Measurement of reflectivity. Reflectivity measurement of the aluminized mylar inserts compared with polished Al cones. Large variation in handling quality tested. For a “reasonable” finish ~92% reflected light observed Preliminary due to small size of Al sample. with polished Al ~15% lower reflectivity measured

Development Work Gluing conical inserts Measuring reflectivity Cooling and Chiller NA62 CEDAR Meeting 3May201213

Draft Chiller Requirements (March 2011) T rise0.5deg C0.25deg C0.10 deg C Bore4mm6mm8mm4mm6mm8mm4mm6mm8mm Flow Pressure Tabulate Flow and pressure for different bores of the internal pipe work and desired temperature rise Chiller Specifications (preliminary web-trawl) ModelPowerFlow 0 bar)Pressure (bar) Fryka DLK  C Grant RC350G 20  C lpm) Neslab Thermoflex 900/P2 40  C 12.5 bar)7 bar Jubalo FC600S 20  C Cole-parmer WU  C Lauda WK 20  C10 14NA62 CEDAR Meeting 3May2012

Thermo-Scientific (NESLAB) The Chiller is ordered: delivery end May – ThermoFlex (5 models: 0.75kW to 4.4kW) 5C to 40C P2 pump gives 4.1b Eg. ThermoFlex 1400 (1170W) = £3,773 + VAT (28 days) Internal detector pipe work is 6 mm (ID) stainless steel 15NA62 CEDAR Meeting 26March2012

Useful Facilities Auto-restart – Chiller can be configure to re-start if mains power is interrupted. I/O – 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) 16NA62 CEDAR Meeting 3May2012

Assembly & Testing NA62 CEDAR Meeting 3May201217

Assembly Frame with Support Tube NA62 CEDAR Meeting 3May

NA62 CEDAR Meeting 3May201219

Assembly Procedure The detector will be assembled and tested in Liverpool: – LH half is fully instrumented with optics, cooling and electronics – Cabling within octants and from octants to patch panel – Functional test of electronics – RH half has cooling plates and pipe-work – Thermocouples and photodiodes to measure environment The assembly frame is mounted and installation tested The environmental case is fitted and environmental measurements made (light and temperature) Ship to CERN and install each half of detector, then environmental case and external cabling to patch panels. NA62 CEDAR Meeting 3May201220

NA62 CEDAR Meeting 3May Support cylinder bolted to CEDAR Cooling block Support Cylinder bolted to CEDAR flange Quartz lens 90 o spherical mirror Octant HV connectors ATEX nitrogen enclosure Detector frame Lightguide

NA62 CEDAR Meeting 3May Frame doubles as: Installation frame for detector Support frame for panels comprising Environmental Case

NA62 CEDAR Meeting 3May Environmental Cover Light- and gas-tight Thermally insulated Faraday cage Fire resistant Patch panels Nino HV

Liverpool Assembly Schedule Assembly Frame with Support CylinderComplete Detector Support FrameComplete ATEX enclosure and Mirror mountsEnd May Lightguides and PMT housingsEarly June Electronics & Octant wiringMid June Cooling panels, chiller & PT100’sMid June Detector cabling and patch panelsEnd June Mechanical installation testEnd June Environmental EnclosureEarly July External cabling to EE patch panelEarly July Temporary LED system and System testMid July Pack and ship to CERNEnd July NA62 CEDAR Meeting 3May201224

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 programme NA62 CEDAR Meeting 3May201225