DOM integration meeting September 13 2016 Daan van Eijk

(personal) News… From March 2017 onwards, I’ll be working as a postdoctoral fellow for the UW Madison in the U.S.A. Inspired by my personal wish to live and work in the U.S. for some years, hence my choice for the IceCube Collaboration Position of KM3NeT DOM integration coordinator is thus vacant!

actions from previous meeting Status of retuned HV on 6 PMTs in DOM67 Daniele will ask Cristiano. News? DOM Integration review: Dedicated presentation White gas: http://www.eurol.com/it/115-products/1705-eurol-kookpuntbenzine-100-140.html http://www.eurol.com/nl/2-producten/210-eurol-kookpuntbenzine-100-140.html http://www.eurol.com/de/113-products/1703-eurol-kookpuntbenzine-100-140.html Then always clean the white gas remnants with the usual isopropylalcohol (it’s all written in the procedure…)

Important points from last meeting Penetrator fiber trays: Please return the new (blue) penetrator fiber trays to Nikhef after the DOMs are spliced to the VEOC DOM registration software: Version 1.7 available: http://svn.km3net.de/integration/DOM_Integration_Software/ DOM testing: To analyse the optical data from a DOM test (i.e. the root files), everyone should use http://svn.km3net.de/data_analysis/MRunAnalyzer/ Google Drive: all documents related to DOM integration are now in: DET/INT/DOMINT (There is also DET/INT/DUINT) Elog: weekly reports, please!

DOM components Red if more than (30 -6) x 18= 432

DOM production status: line types Amsterdam: Built: ORCA-DU2 (A-type), ARCA-DU1 (A-type), ARCA-DU2 (B-type) Finished 18 A-type DOMs for ORCA-DU1 Building C-type DOMs (128-145) and in parallel B-type DOMs (165-182) Catania: Finished 18 C-type DOMs for ARCA-DUx Building D-type (201-218) Naples: Finished 18 D-type DOMs for ARCA-DU3 Building C-type (183-200) Erlangen: Building B-type (73-90) Type A: CH56C-CH22C Type B: CH55H-CH21H Type C: CH55C-CH21C Type D: CH54H-CH20H

DOM production PLanning I want to understand if you think you can still make this?

Open issues Status Catania DOMs with gel issues -> K40 coincidence results? REX opening ARCA-DU3 DOMs: Wrong FW/SW of golden image Small misalignment upper and lower hemisphere Conical spring washer wrong way around Routing of nano beacon cable -> will add to procedure Coolpaste instead of pads/wrong pads Gel remnants between hemispheres (white gas!) REX Nikhef: Small amount of alcohol on vacuum valve O-rings to prevent screwing damage -> will add to procedure

Grounding cable DOM159 before DOM107 after DOM159 after DOM107 before Check by measuring resistance between 12V ground and penetrator body, should be 10 MOhm! Please check all your grounding cables in open DOMs and fix if needed! Please check all your grounding cables in closed DOMs and report number of affected DOMs Will take a decision on those later And: please stop closing DOMs, pending a discussion in the SC regarding the DOM grounding scheme itself

Ncr/dcr

Backup

Summary DOM tests per du/18 DOMs DU2 = ARCA-DU1: http://elog.km3net.de/DOM+Integration/184 DU3 = ARCA-DU2: http://elog.km3net.de/DOM+Integration/185 DU4 = ARCA-DU3: http://elog.km3net.de/DOM+Integration/205 Catania : http://elog.km3net.de/DOM+Integration/225