Keyword: cryomodule
Paper Title Other Keywords Page
TUPDP009 Mobile Pumping Units for Particle Free Beam Vacuum controls, vacuum, interface, PLC 494
 
  • T.J. Joannem, S. Berry
    CEA-DRF-IRFU, France
  • Q. Bertrand, C. Boulch, G. Monnereau
    CEA-IRFU, Gif-sur-Yvette, France
 
  For 10 years our Institute CEA Saclay Irfu has been involved in several in-kind collaboration contracts with ESS at Lund (Sweden) and one of these includes the test of numerous cryomodules in a dedicated test bench designed at Saclay. The cryomodules start to be assembled cavity per cavity in a clean room and must be low pressure pumped, without adding particles and always in a clean room. This is the purpose of the mobile pumping units for particle free beam vacuum. These units are also designed for vacuum automatic procedures, residual gas analysis and can provide conformity reports. Furthermore, a connectable industrial touch panel is added for a mobile operator interface. Only few buttons have to be panel touched by an operator to start automatic procedures in order to get a very high quality vacuum. The embedded control system is PLC based and manages many communications, especially with the spectrometer embedded in the unit. Only one CPU manages all the communications (Profinet, Profibus, TCP-IP ASCII and even Modbus) and sensors or actuators are controlled by four input-output cards. This small-scale control system is innovative because it is versatile, very convenient to use, deploy and maintain. Nine mobile pumping units are operational and continuously used, frequently moved to different locations, controlled locally or remotely and are still reliable. The paper describes the control architecture and functionalities of this small but full of possibilities device.  
poster icon Poster TUPDP009 [2.568 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP009  
About • Received ※ 29 September 2023 — Revised ※ 11 October 2023 — Accepted ※ 09 December 2023 — Issued ※ 15 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUSDSC04 State Machine Operation of Complex Systems operation, vacuum, linac, controls 929
 
  • P.M. Hanlet
    Fermilab, Batavia, Illinois, USA
 
  Operation of complex systems which depend on one or more other systems with many process variables often operate in more than one state. For each state there may be a variety of parameters of interest, and for each of these, one may require different alarm limits, different archiving needs, and have different critical parameters. Relying on operators to reliably change 10s-1000s of parameters for each system for each state is unreasonable. Not changing these parameters results in alarms being ignored or disabled, critical changes missed, and/or possible data archiving problems. To reliably manage the operation of complex systems, such as cryomodules (CMs), Fermilab is implementing state machines for each CM and an over-arching state machine for the PIP-II superconducting linac (SCL). The state machine transitions and operating parameters are stored/restored to/from a configuration database. Proper implementation of the state machines will not only ensure safe and reliable operation of the CMs, but will help ensure reliable data quality. A description of PIP-II SCL, details of the state machines, and lessons learned from limited use of the state machines in recent CM testing will be discussed.  
slides icon Slides TUSDSC04 [6.117 MB]  
poster icon Poster TUSDSC04 [1.031 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUSDSC04  
About • Received ※ 06 October 2023 — Revised ※ 23 October 2023 — Accepted ※ 11 December 2023 — Issued ※ 17 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WE3AO05 Helium Mass Flow System Integrated into EPICS for Online SRF Cavity Q Measurements cavity, controls, operation, interface 1071
 
  • 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
 
  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.  
slides icon Slides WE3AO05 [6.073 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-WE3AO05  
About • Received ※ 09 October 2023 — Revised ※ 12 October 2023 — Accepted ※ 14 December 2023 — Issued ※ 18 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPDP086 LCLS-II Cryomodule Isolation Vacuum Pump System controls, PLC, vacuum, operation 1551
 
  • S.C. Alverson, D.K. Gill, S. Saraf
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by the U.S. Department of Energy under contract number DE-AC02-76SF00515
The LCLS-II Project at SLAC National Accelerator is a major upgrade to the lab’s Free Electron Laser (FEL) facility adding a new injector and superconducting linac. In order to support this new linac, a vacuum pumping scheme was needed to isolate the liquid helium lines cooling the RF cavities inside the cryomodules from outside ambient heat as well as to exhaust any leaking helium gas. Carts were built with support for both roughing and high vacuum pumps and read back diagnostics. Additionally, a Programmable Logic Controller (PLC) was then configured to automate the pump down sequence and provide interlocks in the case of a vacuum burst. The design was made modular such that it can be manually relocated easily to other sections of the linac if needed depending on vacuum conditions.
* https://lcls.slac.stanford.edu/lcls-ii
 
poster icon Poster THPDP086 [18.556 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-THPDP086  
About • Received ※ 03 October 2023 — Revised ※ 27 October 2023 — Accepted ※ 06 December 2023 — Issued ※ 15 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
FR1BCO02 Controls at the Fermilab PIP-II Superconducting Linac controls, EPICS, software, operation 1607
 
  • D.J. Nicklaus, P.M. Hanlet
    Fermilab, Batavia, Illinois, USA
 
  PIP-II is an 800 MeV superconducting RF linac under development at Fermilab. As the new first stage in our accelerator chain, it will deliver high-power beam to multiple experiments simultaneously and thus drive Fermilab’s particle physics program for years to come. In a pivot for Fermilab, controls for PIP-II are based on EPICS instead of ACNET, the legacy control system for accelerators at the lab. This paper discusses the status of the EPICS controls work for PIP-II. We describe the EPICS tools selected for our system and the experience of operators new to EPICS. We introduce our continuous integration / continuous development environment. We also describe some efforts at cooperation between EPICS and ACNET, or efforts to move towards a unified interface that can apply to both control systems.  
slides icon Slides FR1BCO02 [4.528 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-FR1BCO02  
About • Received ※ 04 October 2023 — Revised ※ 12 October 2023 — Accepted ※ 10 December 2023 — Issued ※ 11 December 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)