Betsy, Oli, Tony, Camilla
Yesterday when Betsy, Oli and Tony were inside the ETMX BSC (WBSC9) they took some photos of the transmon mirrors,
- with the illuminators on
- with the illuminators off and an eye-safe Ozoptics green laser injected via the HWS path
Reason for this is that we've had issues with both the ALS 91306 and HWS 91248 beams at EX.
Full telescope assembly is D1002460. The optics on the transmon table are in D1201457. The mirrors are called from transmon towards ETM: M2 , F2, F1, M1. D1102361 and Madi's cartoon, attached from G2500646 shows this.
Betsy notes that the optics with the side HR facing -X (F2 and M1) appear to have considerably more dust on the those facing +X. Is purge air or similar causing this? The dusty side is direction ETMX faces. All the mirrors coating looks intact.
- Transmon - photo a, b, Green QPD A, M12 mirror, again.
- LPM - photo with beam
- M2 (TMS telescope Secondary mirror - parabolic) - photo, with beam
- F2 (Folding Mirror 2 - flat) - photo, with beam, wide
- F1 (Folding Mirror 1 - flat) - photo
- M1 (TMS telescope primary mirror - parabolic) - photo a, b, c , with beam
The HWS path green beam made it though the transmon and retroreflected off ETMX and back onto the HWS CCD, but the alignment isn't perfect as the return beam looks clipped, photo.
