M. Gilchriese Thermal Shock. M. Gilchriese 2 Thermal Shock - Sector 9 Use liquid nitrogen vapor to cool sector rapidly. Setup is just dewar, valve and.

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Presentation transcript:

M. Gilchriese Thermal Shock

M. Gilchriese 2 Thermal Shock - Sector 9 Use liquid nitrogen vapor to cool sector rapidly. Setup is just dewar, valve and line to sector. Open valve, look at temperature, close valve when cold enough. Next step would be to implement simple temperature controller. Plot below is without power on sector.

M. Gilchriese 3 Sector 9 Sector has been tested with C3F8, irradiated to 11 Mrads, raised to +135C, and now cooled with LN2 to about -35C without power, operated near -35C with power, then cooled to about -60C. Imaging done in usual way with room T water at about 21C. Before in the pictures that follow means before thermal shock but after all other tests. There is no evidence for any significant change in thermal performance after thermal shock tests. In addition, it appears possible to easily cool sector with LN2 to actual operating temperature, assuming can implement simple temperature feedback/controller.

M. Gilchriese 4 Before After thermal shock to -35C Power on operation at about -35 to -25C. LN2 enters left. After thermal shock to -60C