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Reports until 16:48, Wednesday 20 August 2014
H1 ISC
sheila.dwyer@LIGO.ORG - posted 16:48, Wednesday 20 August 2014 (13519)
green laser on at end X

Borja, Sheila

We turned on the laser at end X, so that Borja can do a charging measurement after having green light on for 1 day.  To do this Rai would like 50mW of 532nm light on the optic.  When we turned on the laser the setttings were 1.843 Amps 31.8 C  and for the SHG crystal 33.83 C (set value 33.81C). We measured 54 mW of green out of the laser and 34 mW going into the chamber.

Borja adjusted the doubling crystal temperature to 33.53C actual value (33.51C set value) and the power going into the chamber increased to 38.5mW. 

Borja then turned the laser current up to 1.912Amps and the power going into the chamber stabilized at 57.5mW.

We plan to reset the current to the old value after the charging measurement is done, but leave the doubling crystal temperature at this setting.

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