May 29

(return)

Proton beam from methane, difficult setup in Unilac. Setting up TH_HTC, HADES and HADES-PION. Night shift.

• Cave C intensity limit due to spectroscopic silicon detector: 1e7/spill.
• required energy 400 MeV (soft!)
• Now we have 1e10 in SIS
• spill length: 4s for power converter measurements.
• final target: GHTCDF3V, should be sensitive enough
• long optimization of slow extraction... no ways to measure efficiency
• because of PDC - calibration problem for protons (no overlap scintillator-IC)
• beam lost around GTH3MU1,

• Starting up HADES standard (ENGRUN2018)->BEAMTIME2019 (there is more instrumentation of this line, can help to debug HTC)

• observation BEAMTIME19 optics: GTE1QD12 has very small value in this optics... hm... weak steering at high rigidity!
• pion target was partly IN
• back to Cave C
• lot of difficulties to see eprotons
• finally at 5:45, beam at the last screen (GHTCDF3V)
• paramodi save: 2020-05-30_05-51-02_SIS18_SLOW_HTC_20200529_194450.C1.txt
• 1480 - Andrzej phone (EPC)

screenshot of beam on the last scintillating screen in Cave C:

and the corresponding paramodi file: 200530_054834_20200530_054648_sis18_slow_htc_20200529_194450_c1.txt