Schedule & Plans for Commissioning Run K.T.Knöpfle K.T.Knöpfle MPI Kernphysik, Heidelberg ktkno@mpi-hd.mpg.de GERDA Collaboration Meeting at LNGS 1 – 3 March 2010
Outline • update weekly schedule • options for technical / commissioning run • run team 2010 Mar 2 Schedule, plans - K.T.Knöpfle 2
2010 month jan february march apr 5 6 7 8 9 10 11 12 13 14 15 16 17 18 calendar week 4 2010 28 30 1 3 5 8 10 12 15 17 19 22 24 26 1 8 15 22 29 6 12 19 26 3 task / day b / 1 mar 2 lock ship to LNGS X ! install it in cleanroom ? ? isolating flange delivery isolating flange delivery e of 24 feb ✔ / SMA feedthru flange del/rdy install ext. gas system @ cleanroom update ✔ ✔ clean it ✔ including He leak test mount cluster flange/shutters ✔ mount clean bench ✔ ✔ mount 2nd c lock support mount 2nd c-lock support install int gas system install int vacuum system ✔ / ✔ X mini UHV shutters del/inst X ( ✔) ✔ install 1/3 source mechanics ✔ 1 of 2: replace blue support bars tests ✔ ✔ source mechanics in HdM source mechanics in HdM X He leak test lock ? lock mechanics ✔ test running Rn emanation monitor ? ? Rn emanation lock !! ?? insert dummy detector 1/2
2010 month jan february march apr 5 6 7 8 9 10 11 12 13 14 15 16 17 18 calendar week 4 2010 27 29 1 3 5 8 10 12 15 17 19 22 24 26 1 8 15 22 29 6 12 19 26 3 task / day b / 1 mar 2 @ e-cabinet ✔ Install racks ✔ install cooling & power X ✔ ✔ fix cable length fix cable length e of 24 feb route cables lock - e-cabinet X install / test electronics install/ test DAQ update slow control demand driven PRIORITIES! complete hardware integration WT drainage WT drainage ✔ pneumatic actuators delivery X dto installation / test ✔ 3 rd flow rate test, w Ø110 diaphragma ? ? 8m flow rate test w Ø110 diaphragma new flow regulator delivery X X DN65 flow regulator deliveries !! !! test of DN65 regulators test of DN65 regulators pipes/flow meter re-installed/tested misc control room furnitures/PC roots pump electrical inst X c-lock PLC installation ? 2/2
Outline Open issues: immediate immediate filling of WT – linked to WT drainage delivery of c-lock arm for 1x 3-diode string delivery of c-lock arm for 1x 3-diode string muon veto commissioning close to immediate close to immediate delivery of 2 nd arm of c-lock for 3 x 3-diode string operation 2010 Mar 2 Schedule, plans - K.T.Knöpfle 5
plan / options Goal of commissioning run: Goal of commissioning run: set up and test c-lock for single string - do muon veto commissioning in parallel install diode(s), test electronics, DAQ, and calibration procedures, get first information about background gain experience for operation of 3x3-diode string with enriched Ge diodes How to proceed in detail – various options: obvious steps mechanical test with weight – ist-soll comparison electrical test with capacitor He leak test cleaning of glove box ( & LAr surface? ) tests with prototype & cap to be optimized Rn assay of c-lock arm - when and how long? R f l k h d h l ? How many Genius TF diodes to be immersed? Any enriched diode? 2010 Mar 2 Schedule, plans - K.T.Knöpfle 6
develop / produce 3x3-diode string c-lock arm schedule v0 muon veto commissioning 8m WT run week 6 run week 6 drainage test NOW run week 2 basic electric t tests t write LAr paper? surface run week 3 run week 3 clean? continue? 2m WT drainage test? non-enriched? test w prototype c-lock delivery 1 + cap run week 4 install & connect install x Genius TF clean y enriched glove box l b run week 5 WT filled basic run week 1 mechanic diodes & c-lock delivery 2 l k d li 2 tests install Rn monitor 2010 Mar 2 insert Schedule, plans - K.T.Knöpfle 7 commission! run week 6 dummy load
paper? PAPER: realistic goal? - Would be nice support for funding requests…. 1) RESULT ON BACKGROUND INDEX (BI) ABOVE 1900 keV: Assume BI of 0.1 resp 0.01 cts per (kg keV y) in RoI of ~2000 – 2600+ keV, exposure m x t = 6 kg x 0.1 y (non-enriched) t 6 k 0 1 ( i h d) ► expect 36 resp 3.6 counts in RoI (a bit too optimistic, perhaps rather 25 and 2.5)! 2) RESULT FOR 2 ν 2 β BACKGROUND BELOW 1900 keV: If BI ~ 0 01 nice comparison of DBD spectrum of enriched & natural Ge diode! If BI ~ 0.01, nice comparison of DBD spectrum of enriched & natural Ge diode! 2 ν 2 β background will dominates – factor 10 larger in case of Ge-76! (6x10^23 x 0.1 / 10^21 = 60 per mol Ge-76 and per 0.1 year). 3) LIMITS FOR KNOWN LINES i.e. LIMITS on CONTAMINATIONS: 2010 Mar 2 Schedule, plans - K.T.Knöpfle 8
measured spectra spectra measured at LNGS with Ge diode unshielded unshielded Tl-208 x nd Index ackgrou Ba shielded predominantly external γ -rays p y γ y GERDA phase I goal 2010 Mar 2 Schedule, plans - K.T.Knöpfle 9
3x3 string test setup with strings of rather different weights ► no strong deflections 2010 Mar 2 Schedule, plans - K.T.Knöpfle 10
3x3 string first design study isolated rotatable 2010 Mar 2 Schedule, plans - K.T.Knöpfle 11
3x3 string To Do List provide 2 nd DN250 shutter - done replace motor & safety clutch replace cable drum provide feed thrus, isolation flange, cables run 30+ cables in energy chain provide DN150-DN250 interface provide two DN250 tubes, one with bellow to modify length design mounting sequence - design mounting sequence started started design & provide mount/support for 3 strings incl. front end - started GOAL: get it delivered by end of June! 2010 Mar 2 Schedule, plans - K.T.Knöpfle 12
run team We need to establish a run team* within a few weeks! * difference shifter – run team: •shifter: changing •shifter: changing - sometimes present sometimes present • run team: fixed - always present 2010 Mar 2 Schedule, plans - K.T.Knöpfle 13
the end 2010 Mar 2 Schedule, plans - K.T.Knöpfle 14
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