R&D (Cryogenic)
KoheiMitsuhashi - 07:21, Monday 12 December 2022 (3124)
install the new cavity mirror and the demodulate part

Mitsuhashi, Shalika,

 

We installed the new cavity mirrors and the demodulate part.

• install the new cavity mirrors
The new cavity mirrors' ROC is the same as the previous one(ROC=50mm)

 

• install the demodulate part
We install the preamplifier(SR560 made by Stanford Reserch System), the local osillator(AFG1062 made by Tektronix), and the mixer(ZAD-1-1+ made by Mini-circuits) to demodulate the beam.
The setup of the local oscillator's phase was 85°.
The setup of the preamplifiler was as follows(The picture was attached).

filter cutoffs[Hz] 300
low pass [dB/oct] 6
gain mode low noise
gain ×500
Images attached to this report
3124_20221212024400_figure1.jpg