Detector moved underground in the Gator box and installed in the borated-PE shielding borrowed from the Baudis group.

• GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20231218_174913.root to GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240109_122152.root
  Usable. 24hr long (except for the first file). Variable threshold based on baseline+RMS. Timestamp not usable due to bug in DAQ software.
• GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240110_122154.root to test_new_20240116_164636.root
  Forget about them.

• Installed metal mesh around HV an signal cable to see if the noise bursts disappear, with no improvement.
• Tested USB isolator (12 MBps) to see if the noise bursts disappear, but it significantly increases the dead-time, so forget about it.
• Fixed bug on the timestamp calculation in the DAQ software.

• GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240116_174215.root to GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240212_174649.root
  Good, 12hr long, variable threshold based on baseline+RMS.
• GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240213_054654.root
  Killed for tests
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240213_103959.root to GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240213_144051.root
  Tried, but unfortunately didn't work.
• GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240213_155946.root to GAGG_SelfTrigger_HV_1.4kV_UG_bkg_20240403_050748.root
  Good, 12hr long, variable threshold based on baseline+RMS.

AmBe source n. 132 with neutron activity of ~50 neutrons/sec installed in the morning of April 8, 2024. The source was placed in front of the detector, inside the borated-PE shielding, with an additional 5cm thick layer of standard PE as a moderator. An additional 5cm thick lead shielding was placed inside the borated-PE on the sides and above the detector. On April 10, at 14:10, the lead shield was removed and the AmBe measurement restarted with the borated-PE and the PE moderator only. On April 11, at 11:50, the PE moderator was removed and a 20x10x5cm Cu brick was placed between the source and the detector to suppress the 4.4 MeV gamma and to mimick the neutrons from (alpha,n) reactions in the crystal.

• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_100852.root
  Good, 1hr long, threshold automatically set based on baseline+RMS.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_112400.root
  Crashed after ~3hr due to memory leak in DAQ program. Data should be recoverable, but meta-data are missing from raw data file.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_144004.root
  Killed after ~2hr to solve the memory leak. Data should be recoverable, but meta-data are missing from raw data file.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_165158.root to GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_225221.root
  Good, 1hr long, threshold automatically set based on baseline+RMS.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_233021.root
  Test run with threshold fixed to 15100. Very short, not worth using.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240408_234213.root to GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240410_131639.root
  Good, 30min long, threshold fixed to 15100.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240410_134643.root
  Killed to remove lead shield.
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240410_141311.root to GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240411_111539.root
  Good, 30min long runs, threshold fixed to 15100, borated-PE and PE moderator only (Pb shielding removed).
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240411_114543.root
  Killed to remove PE moderator and insert Cu brick
• GAGG_SelfTrigger_HV_1.4kV_UG_AB_20240411_115611.root to XXXX
  Good, 30min long, threshold fixed to 15100, 20x10x5cm Cu brick between source and detector (PE moderator removed) to mimick neutrons from (alpha,n) reactions in crystal.

Custom-made (gamma,n) source composed of a lens with 232Th glass and mica with 238U placed in front of a 2.4mm thick Be layer. In addition, we placed a 5cm thick copper brick to suppress the count rate from gamma events, and 5cm of standard PE as a moderator. Energy threshold set to ~2.3 MeV to suppress the trigger rate and avoid writing huge files.

• Files GAGG_1.4kV_UG_gamman_20241220_150633.root to GAGG_1.4kV_UG_gamman_20250114_051338.root
  Good. These are the actual (gamma,n) data, with a net count rate above 3.5MeV of around 5.5 events/hr.
• Files GAGG_1.4kV_UG_gamman_2cmAl_20250114_172836.root to
  Good. Data taken with a 2cm Al brick in place of the 2.4cm Be layer to cross-check that all events above 3.5MeV seen with the Be are indeed neutrons.