Detector Status

J. Brunner15/10/2014

May 2014• Proudly take over commando on MS ANTARES

• Astronomy with a Neutrino Telescope and Abyss Environmental Research

October 2014• Consider Rebaptizing

• Truly Immense Telescope for Astronomy with Neutrinos Inducing Cherenkov light

Content

• Losses of Detector Lines• Upgrade shore station• Optical Margins• UPS Situation• Data Taking Status• Planning of shifts for 2015

Active Lines per time• End of stability period this summer

Active Lines

Usable JB output

2011 2012 2013 2014

Instrumentation Line

Change of Management

Details on Losses• End of stability period this summer

Loss L3

Return L3

Loss L5

Loss L6, IL

Victor Operation

Details on Losses• Line 3:

– 25/06/14 : Thunderstorm : power cuts at IMP– power cut of the Detector at 05:09:07.6 – 25/07/14 : rearming successful, line operational

• Line 5:– 22/08/14 at 23:49:48 during Run 77623– no power cut : Lines 1,5,10 stopped working– Lines 1,10 could be recovered by JB off/on– 52 active OMs lost

• Line 6, IL– 22/09/14 at 06:42:50.4 during run 78054 – No power cut, JB3 opened– 65 active OMs lost

Junction Box

• From June-September three JB breakers opened• Suspicion : Problem inside JB• 9 years trend of humidity : slight increase, stable• Checked various other parameters : all ok

2005 2008 2011 2014

Card C (battery)Card B

Line 5,6, IL – Optical Measurements• Optical Loop– Line 5 : June 17db August 19db, stable– Line 6 , IL : both better than 20db ok

• OTDR : IL, Line 6 : reflection up to BSS, ok

ROV operation July• Junction Box inspection• IL Cables not under tension

X-BOX PowerX-BOX FiberLine 3

ROV operation July• Junction Box inspection• IL Cables disappear in the ground

Line 5Line 4

Asymmetries• 7 lines have small asymmetries• Subtle changes due to line losses

Line 5Line 6

Asymmetries• Asymmetries normally linked to problems in interlink cables• Suspect interlinks

– IC13 (to IL) : repaired on ship years ago– All cables on JB14,15,16 : high tension due to JB movement in 2008

• All lines with high asymmetry stopped working• Line 6 : Asymmetry due to IL• Next candidate : Line 4• Line3 : ok – not understood

Line 6

Line 4

Line 3

Line 5

IL

Sea Operation October 2014

• IFREMER : “Pourquoi Pas” and VICTOR ROV• 14 days mission (“Estime”)• First step : Connect Oxygen probe on BJS• In parasitic mode : 2h on ANTARES– Various disconnections to identify problem

• Result– Oxygen probe installed, operational– 3 disconnections performed close to JB

Sea Operation October 2014

• First step : Disconnect IC13 on X-Box• Images from Nov 2010

Sea Operation October 2014• Images from July 2014• After 45min : successful disconnection !!

Sea Operation October 2014• Images from Oct 2014• After the successful disconnection !!

JB Connector Layout• Situation before VICTOR operation

L6 L13

Interlink cables under tension

JB Connector Layout• Situation after VICTOR operation 11/10/14

L6 L13

2

1

3

Interlink cables under tension

Junction Box Breakers

Successfully rearmed

Successfully switched

Rearming Unsuccessful

Summary Sea Operation

• Junction Box in good shape after 12 years• Still 3 Lines non-operational (Line5, Line6, IL)• 3 JB outputs recovered• Interlink cables to IL and to Line 5 suspected• Line 6 revival : only one connection operation• Line 5 revival : new IC plus 2 connections• Possibility of future “parasitic” use of

submarins will be explored

Shore Station Upgrade

• Preparation Work for several months in 2014• dfilter code upgraded (64bit) by A. Heijboer• 27-28 May 2014 : Upgrade successfully done– B. Vallage, M. Ageron, J. Brunner– Two fallback solutions retained :• java : still version 1.6.0 (planned was 1.7.2)• dhcp server off-shore : still polaris (planned was sagitA)

Shore Station Upgrade

• Current situation : new machines (SL6, 64b)– sagitA : new server nfs, dhcp (onshore), nis– sagitB : mirror (nightly synchronised)– nodes 60-87 (quadruple core) : new rack room• 128 dfilter processes (maximum so far)

– castor, pollux, procyon, mira (control room)• Old machines (SL6,64b) : old rack room– nodes-9, node-10 : ligier message, logger– node 11-21 : 12 dqueue processes

Shore Station Upgrade

• Current situation : old machines (SL4, 32b)– polaris : server dhcp (off-shore), gateway http– sirius : GRB handling– antclock (do not touch)– antjbsc, antjbsc3• Investigate RS-232 problem (12V output needed)• Replace machines once a solution is found (M. Ageron)

– node 23-49 (SL4, 32b) : retired, standby

Optical margins

• D. Tezier & M. Ageron : 09/07/14• Comparison to 22/03/2011 : stable within 2dB

-1db -6db

Optical margins Line 3

Ligne 3 IP TX RX

SCM 192.168.4.53 20,8 18,67

S I 192.168.4.3 15,93 17,76

S II 192.168.4.10 15,32 16,84

S III 192.168.4.8 14,71 16,23

S IV 192.168.4.168 15,32 16,54

S V 192.168.4.62 15,32 15,32

Reference 2011 : All values well above 30db important loss since !Likely reason for absence of optical loop

Line 3 Interlink cableKnot with some object (plastic bag)Try to open the know with Comex submarine only partially successful

Cable bending might explain strong attenuation Attenuation might explain absence of optical loop

UPS Situation IMP

• June 2014 – New batteries ordered for both main UPS at IMP

• Successfully installed 11/09/14 !• Warranty for upgraded systems 3 years• Additional two small UPS (1.6 kW) installed for

dedicated equipment– Clock computer – Card D of JB to avoid shutdown of JB in case of IMP power

cut• UPS for detector (~10,000 Euro) – currently not considered

UPS

• UPS for new rack room remotely monitored

UPS Situation IMP

• 10/10/2014 thunderstorm La Seyne• Several differential breakers at IMP open– DWDM, some dqueue, switch in new rack room

• Intervention from CPPM needed• Few hours data taking lost• it seems the installed UPS does not protect

against voltage spikes in input (e.g. lightning during thunderstorm)

• close to useless ….

Operations (plots from Damien)

Neutrinos per dayAveraged over 1 monthuntil October 2014

Muon Rate from June-October 2014Difficult to conclude due to corrleation with bio rate

Operations (plots from Damien)

Active data taking until October 2014

Muon rate evolutionUntil Ocotber 2014

2016

Recent K40 Rates20% Loss in rate per year despite charge calibration10% loss of PMT efficiencyROV survey July : most likely due to “biofouling”Explore possibility to “clean” OMs (under study)

Shift quota• Mail to group leaders on 01/10/2014• Author list group member count updated (118)• Shift list will be filled in November

Institut A Institut A Institut A Institut A

Oujda 2 GRPHE 3 COM 3 Genova 3

Wurzburg 2 APC 9 GeoAzur 2 Rome 4

Bamberg 2 Clermont 1 LAM 3 Napoli 3

ECAP 27 IPHC 1 IFIC 6 Bari 1

CEA 4 CPPM 11 UPV 5 Catania 2

NIKHEF 9 ISS 3 Bologna 4 LNS 8

Run Coordinators & Operations Manager

• List of volunteers for 2015 in alphabetical order (2months == 4 shifts) :– Bruny Baret, Ronald Bruijn, Juergen Brunner, Damien

Dornic, Oleg Kalekin, Vladimir Kulikovsky, Robert Lahmann, Dorothea Samtleben

• Operations Manager – Alexander Enzenhoefer– Start (probably) at 01/02/2015

Detector Dismantling

• Tender for dismantling study• J.F. Drogou (ex-IFREMER) obtained contract• Monthly meeting to progress with project• Goal– Set up different scenarios– Define time and equipment needed– Define procedures

Conclusion

• We will continue to do our best ….

Detector Survey• Line 1 survey during ROV operation July 2014• Likely reason for observed efficiency drop• Cleaning possible ? being investigated

Line 3 – Tests• Optical loop measurements – No optical Loop for Line 3– all other lines OK

• Ping of acoustic releases (16/07/14)– Acoustic Releases Line 3 (both) do not respond – other lines ok (with exception of 1 release)

• Suspicion : Line 3 is gone …• Comex : Janus 2 + Apache ROV– 23-25/07/14, 12h dive on 24/07/14– Check Line 3 still in place– Try to understand reason for failure– General detector survey

Line 3• Friday 25/07/14 : new trials to rearm breaker• Documentation not clear• Software gives ambiguous replies• Correct RS232 command “<space>0SB”– G. Hallewell, S. Henry, JB

• Rearming without problems !• Spontaneous breaker opening not understood• Acoustic Releases Coincidence ?• Optical Loop see next slides

Line 3 – ROV operation• Line 3 in place, nothing suspicious• Release system ok• Connector ok