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Tests of the LH2 target at GSI 2 nd -4 th april 2014

The LH2 target. Tests of the LH2 target at GSI 2 nd -4 th april 2014. T. Hennino , C. Commeaux (IPN Orsay) T. H einz, E. Schwab (GSI). Aim of the test. Restart the target in the GSI environment Preparation actions Target transported from Orsay by T. Heinz in march

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Tests of the LH2 target at GSI 2 nd -4 th april 2014

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  1. The LH2 target Tests of the LH2 target at GSI2nd-4thapril 2014 T. Hennino, C. Commeaux (IPN Orsay) T. Heinz, E. Schwab (GSI)

  2. Aim of the test • Restart the target in the GSI environment • Preparation actions • Target transportedfrom Orsay by T. Heinz in march • Reinstalled on the HADES beam line with all connections (T.Heinz + E. Schwab)

  3. Problemsencountered The compressor at GSI • Low4He pressure in the compressor (200 psi instead of 270-300)  compressorrefill (bringspecific pipe/connector to GSI) • Water leak on the compressorcooling circuit  repair (GSI) • Missing control box of pressure sensor PG02  exchange with PG01 (directlypowered) • Box found in cabinet (to berepaired (T. Heinz) or replaced)

  4. Logbook of actions and results • 2/4/2014 10:45 start vacuum pumps • 2/4/2014 11:15 conditionning (purge) • 2/4/2014 14:30 start of cooling down • 2/4/2014 20:00 20°K reached in condensor • 2/4/2014 23:55 29°K reached at the target • 3/4/2014 0:30 compressorstopped for the night • 3/4/2014 6:15 restart of compressor • 3/4/2014 10:00 coolingfinished: target full • 3/4/2014 several cycles empty/full target over more than a day OK • 4/4/2014 11:45 Target stopped

  5. Further actions • Restart the targetweek 7-11 april (Torsten alone) • Target removalfrombeam line and preparation of test runwith proton • Saving the computer disk (M. Traxler on Monday 7th) • Update the note « workingprocedure of the HADES LH2/LD2 target » • New visit at GSI in may (week 20 or 21)

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