65 K Two-Stage MR/O2 Throttle Cycle Refrigerator

Temperature instability comparison of micro- and mesoscale Joule-Thomson cryocoolers employing mixed refrigerants

“…Longsworth [8], Luo [9], and Maytal [10] all make reference to fluctuations in temperature whether from flow fluctuations or intermittent clogging. Solutions have come by way of varying the J-T valve restriction during operation in some manner to alleviate the restriction to reestablish proper flow and/or remove clogs, which take place primarily at or near the J-T expansion valve.…”