With reference to entry 37 Laser timing:
- at last 30 injections accumulation: 10k counts on particle detector (accumulated during manipulation until it saturates, e.g. no more Th in ESR)
- at first 70 injections accumulation: 7.6k counts
- at second 70 injections accumulation: 2.8k counts
did another 2 30 injections accumulations to confirm lower yield:
- at first 30 injections accumulation: 3.7k counts
SIS intensities look fine, around 1.2e9
- at second 30 injections accumulation: 6.9k counts
saved to /data.local2/2025_229Th/2025_229ThDAQ1_0101.lmd with DAQ1
SIS intensities look fine, around 1.2e9, only users during injection
"late" contaminants on PD seem to quickly disappear after start of modulation 3
(attachment 1: full timing spectrum, attachment 2: timing spectrum at the end of the modulation)
- at second 60 injections accumulation: 0 counts, maybe scrapers overshot,did another one, still not accumulating
------------------- Some issue on accelerator side -------------------
FSR people had to go into cave, that's why we were the only users,
but since nothing got into ESR
Connection to scrapers was lost, on call service had to do a reset
- at second 60 injections accumulation: 11.9k counts
saved to /data.local2/2025_229Th/2025_229ThDAQ1_0102.lmd with DAQ1
again observed that the late contaminant om the particle detector (see attachment 3) is more prominent in at the beginning.
This also manifests in an early steep fall off on the counts/s, see attachment 4 |