The SNS Cryogenic Control System: Experiences in Collaboration

The cryogenic system for the Spallation Neutron Source (SNS) is designed by Jefferson Laboratory (JLab) personnel and is based on the existing JLab facility. Our task is to use the JLab control system design [2] as much as practical while remaining consistent with SNS control system standards. Some aspects of the systems are very similar, including equipment to be controlled, the need for PID loops and automatic sequences, and the use of EPICS. There are differences in device naming, system hardware, and software tools. The cryogenic system is the first SNS system to be developed using SNS standards. This paper reports on our experiences in integrating the new and the old.Comment: 3 page

SLIS Connecting Volume 7 Issue 1

SLIS Connecting refereed open-access e-journal, Volume 7, Issue 1 (Spring/Summer 2018, Special Issue: British Studies

Automated electronic system for measuring thermophysical properties

Phase-charge coatings are used to measure surface temperature accurately under transient heating conditions. Coating melts when surface reaches calibrated phase-charge temperature. Temperature is monitored by infrared thermometer, and corresponding elapsed time is recorded by electronic data-handling system

Apparatus for determining thermophysical properties of test specimens

Apparatus is described for directly measuring the quantity square root of pck of a test specimen such as a wind tunnel model where p is density, c is the specific heat and k is the thermal conductivity of the specimen. The test specimen and a reference specimen are simultaneously subjected to the heat from a heat source. A thermocouple is attached to the reference specimen for producing a first electrical analog signal proportional to the heat rate Q that the test specimen is subjected to and an infrared radiometer that is aimed at the test specimen produces a second electrical analog signal proportional to the surface temperature T of the test specimen. An analog-to-digital converter converts the first and second electrical analog signals to digital signals. These digital signals are applied to a computer for determining the quantity

SLIS Connecting Volume 5, Issue 2

SLIS Connecting Volume 5, Issue 2 (Fall/Winter 2016

SLIS Connecting Volume 6, Issue 2

SLIS Connecting Volume 6, Issue 2 (Fall/Winter 2017

SLIS Connecting Volume 6, Issue 2

SLIS Connecting Volume 6, Issue 2 (Fall/Winter 2017

SLIS Connecting Volume 8 Issue 1

SLIS Connecting refereed open-access e-journal, Volume 8, Issue 1 (Spring/Summer 2019