DOM INTEGRATION MEETING DAAN VAN EIJK 1 OCTOBER 2015

INTRODUCTION My apologies for the late notice for this meeting I’ll be on holidays next week (October 4-11) Urgent matters: Marco The week after is the week of the Collaboration Meeting I hope to see many of you! 2

ISSUES FROM PREVIOUS MEETING Default fiber to splice on PAVE penetrator: the black one Proposal to mark the spliced fiber outside of the DOM The mark can be positioned very close to the exit of the fiber protection tube. That position is the less handled during the BEOC mounting so we can assume the mark will not fade out with handling. If default (black): with Tipp-Ex If white: with pen/ink DOM integration procedure: Irene didn’t have time to work on it as she’s working on the base container DOM integration review: Date? Help needed? 3

DOM INTEGRATION STATUS: DU-2 DOM production for DU-2: 18 DOMs finished in Amsterdam (CH56C down to CH22C) All DOMs connected to DU-2 VEOC! 3 DOMs ready for acceptance test in Naples (CH32C down to CH28C) I hope to hear from Daniele about the status of their test setup 3 DOMs finished in Catania (CH26C down to CH22C) 4

DU-3 AND ONWARDS Amsterdam: type B (CH55H-CH21H) 12 DOMs on assembly benches in Amsterdam Filled PMT structures are ready for at least 10 more DOMs Erlangen: type B (CH55H-CH21H) Catania: type C (CH55C-CH21C) Naples: type D (CH54H-CH20H) These DOMs are (pre-)registered in the DB. The UPI’s have been distributed to you. 5

DOM COMPONENTS DOM integration goal 18 DOMs to be built at each integration site (Catania, Naples, Erlangen) before the end of the year DOM component situation improved since last meeting 64 PAVE penetrators arrived at Nikhef Testing will start as soon as possible 20 new fiber trays have arrived Re-design including a holder for the A/D filter QR code Availability of DOM components remains a problem (Except for Nikhef) I prepared a shipment for Naples: All components needed to complete 18 DOMs Except PMT’s, penetrators (coming soon after testing) and grounding cables The boxes will be included in shipment of DU-2 to Naples I will prepare similar shipments for Catania and Erlangen soon 6

CURRENT ISSUES ELOG usage: Every individual DOM is now defined as “Type” This makes it easy to collect all information about one particular DOM We started using the elog as placeholder for functionality and acceptance test sheets Please do the same for your DOM tests! Please have a lookand use the elog! CLB/AHRS statistics at Nikhef: Waiting for more news/info from Giorgio At next Steering Committee? Firmware and embedded software versions to be flashed on CLB’s For now: use latest revision as advertised on sions sions Waiting for more news/info from Giorgio/Tommaso/Diego At next Steering Committee. 7

CURRENT ISSUES DOM testing Waiting for a calibration procedure for the AHRS Only when this is defined, we can start measuring meaningful values to be filled out on the acceptance test sheet Waiting for input from Calibration Group PMT threshold In ALL setups (i.e. DarkBox, Green Box, Blue Box, anything!) the PMT threshold should be set to “2F”, translating in 1113 mV That’s the value at which the PMTs were calibrated in the DarkBox Analysis software: We need to define a standard, which can then be centrally distributed Ideas? Dark storage of DOMs before testing Proposal for integration sites without dark room to store DOMs in light-tight bags Suggestions? 8

DOM TEST RESULTS 9 DOMAcceptedPROMi S ID PressureIBoot time FPGA TWR THumidit y Piezo noise Piezo line # PMTs [N] DC #PMTS [N] ToT 40NNNNN/A NNN NNNN/A 43NNN926 NNN/A N N/ A325 28NN529 NNNNN/A NN15 31NN626 32NNN627 33NNN/ANN4 64NNNN NNNN828 37NNN NN313 39N629 38N324 65NNN526 66N417 70NN24 71NN35 72NN219 Notes: Catania DOMs Underlined: DOM31 and DOM38 have new PMT structure: improvement in dark count? New HV caps: no effect observable in DC’s No compass calibrations performed on any DOM (no procedure defined, excluded from this table)

COLLABORATION MEETING There is a DOM integration time slot of half an hour Who will be there from the DOM integration leaders? Can I ask you to present the status (max. 6 minutes each)? For the people who are not present: will you present remotely or find someone else to replace you? Emanuele asked to have a tour around the Nikhef DOM integration site A very good opportunity to exchange experience! Invite all DOM integration team leaders + others interested Proposal: Tuesday 13/10, 14:00 – 16:00 10

BACKUP 11

DB: RED-TAGGING 12