Citation for Published Item: Use Policy Cryogenic Tests of Volume-phase Holographic Gratings: Results at 100 K

We present results from cryogenic tests of Volume-Phase Holographic (VPH) gratings at ∼ 100 K. The aims of these tests are to see whether the diffraction efficiency as a function of wavelength is significantly different at a low temperature from that at room temperature and to see how the performance of a VPH grating is affected by a number of thermal cycles. We have completed 10 cycles between room temperature and 100 K, and find no clear evidence that the diffraction efficiency changes with temperature or with successive thermal cycle.