Detector, Electronics and Photometry benches at LPNHE
The three test benches presented below (1st cryo., 2nd cryo. and photometry) reflect the evolution along 5 years of the R&D requirements encountered in various phases of our involvement in the SNAP, SNDICE (and maybe LSST) projects. We managed to keep the ensemble globally coherent using a component approach. Basically different applications can be built by combining electronic, optical, cryogenic and software components around the three benches.
1st Cryogenic Detector Bench
View of LBNL CCD chip mounted on photometric focal plane
- Commissioning Vacuum/Optical (June 2004)
- DAQ : version A
(UCSD) / version
B (LabView)
Presently this bench is equipped with a "photometric focal plane" (2 calibrated PhotoDiodes -Si&InGaAs-, 2 other PD Si, a webcam) on which is mounted a LBNL thick n-CCD.
The various light sources are mountable on a mini optical bench driven by an X&Y motion (cf. components). All the components are within a large
black box supported by the anti-vibration table. The light sources on the bench are either direct illumination or focussed (6 μ artificial star for intra pixel studies). For spectrophotometric studies a 3 gratings monochromator (usually situated outside black box) is connected by a Q-fiber to the bench. It covers 0.3 to 2 μ wavelength range.
2nd Cryogenic Detector Bench
Cut of cryostat showing 1RG detector in place
- Commissioning Vacuum/Optical
- Commissioning IR electronics and DAQ
- Report at NIR meeting (Ann Arbor March 2005)
Photometry Calibration Bench
Photometry calibration bench installed in a dark cabinet
- a
- b