Cryogenic Tests of Volume-Phase Holographic Gratings: I. Results at 200 K

Details Cryogenic Tests of Volume-Phase Holographic Gratings: I. Results at 200 K Cryogenic Tests of Volume-Phase Holographic Gratings: I. Results at 200 K

2003-11-22

arxiv.org/abs/astro-ph/0311517v1

Exper.Astron. 15 (2003) 1-12

Astronomy and Astrophysics

Astrophysics

14 pages, 7 figures, accepted for publication in Experimental Astronomy. A version including figures with higher quality (PDF

Scientific paper

10.1023/B:EXPA.0000028163.98901.

We present results from cryogenic tests of a Volume-Phase Holographic (VPH) grating at 200 K measured at near-infrared wavelengths. The aims of these tests were to see whether the diffraction efficiency and angular dispersion of a VPH grating are significantly different at a low temperature from those at a room temperature, and to see how many cooling and heating cycles the grating can withstand. We have completed 5 cycles between room temperature and 200 K, and find that the performance is nearly independent of temperature, at least over the temperature range which we are investigating. In future, we will not only try more cycles between these temperatures but also perform measurements at a much lower temperature (e.g., 80 K).

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