| Title |
Helium Mass Flow System Integrated into EPICS for Online SRF Cavity Q Measurements |
| Authors |
- K. Jordan, G.R. Croke, J.P. Jayne, M.G. Tiefenback, C.M. Wilson
JLab, Newport News, Virginia, USA
- G.H. Biallas
Hyperboloid LLC, Yorktown, Virginia, USA
- D.P. Christian
JLAB, Newport News, USA
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| Abstract |
The SBIR funded Helium Mass Flow Monitor System, developed by Jefferson Lab and Hyperboloid LLC, is designed to measure the health of cavities in a Cryomodule in real-time. It addresses the problem of cavities with low Q₀, which generate excess heat and evaporation from the 2 K super-fluid helium bath used to cool the cavities. The system utilizes a unique meter that is based on a superconducting component. This device enables high-resolution measurements of the power dissipated in the cryomodule while the accelerator is operating. It can also measure individual Cavity Q₀s when the beam is turned off. The Linux-based control system is an integral part of this device, providing the necessary control and data processing capabilities. The initial implementation of the Helium Mass Flow Monitor System at Jefferson Lab was done using LabView, a couple of current sources & a nano-voltmeter. Once the device was proven to work at 2K the controls transitioned to a hand wired PCB & Raspberry Pi interfaced to the open-source Experimental Physics and Industrial Control System (EPICS) control system. The EE support group preferred to support a LabJack T7 over the rPi. 12 chassis were built and the system is being deployed as the cryogenic U-Tubes become available.
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| Paper |
download WE3AO05.PDF [0.846 MB / 6 pages] |
| Slides |
download WE3AO05_TALK.PDF [6.068 MB] |
| Cite |
download ※ BibTeX
※ LaTeX
※ Text/Word
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※ EndNote |
| Conference |
ICALEPCS2023 |
| Series |
International Conference on Accelerator and Large Experimental Physics Control Systems (19th) |
| Location |
Cape Town, South Africa |
| Date |
09-13 October 2023 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Volker RW Schaa (GSI, Darmstadt, Germany); Andy Götz (ESRF, Grenoble, France); Johan Venter (SARAO, Cape Town, South Africa); Karen White (SNS, Oak Ridge, TN, USA); Marie Robichon (ESRF, Grenoble, France); Vivienne Rowland (SARAO, Cape Town, South Africa) |
| Online ISBN |
978-3-95450-238-7 |
| Online ISSN |
2226-0358 |
| Received |
09 October 2023 |
| Revised |
12 October 2023 |
| Accepted |
14 December 2023 |
| Issued/td>
| 18 December 2023 |
| DOI |
doi:10.18429/JACoW-ICALEPCS2023-WE3AO05 |
| Pages |
1071-1076 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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