Keyword: ion-source
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WEBR03 The Fast Protection System for CSNS Accelerator hardware, operation, power-supply, linac 593
  • Y.L. Zhang, D.P. Jin, P. Zhu
    IHEP, Beijing, People’s Republic of China
  The fast protection system for CSNS accelerator is a FPGA based protection system. The VME bus and SFP was adopted by the FPS. The FPS includes one central station and several sub-stations, and connnections between the central and the sub-stations are in star style. Two kinds of beam stopping modes are designed and implemented by FPS, one is the transient beam stopping and auto recovery mode, the other is the permanent beam stopping mode. The measured response time for the FPS is less than 1.5 micro-seconds.  
slides icon Slides WEBR03 [2.773 MB]  
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About • Received ※ 19 October 2021       Revised ※ 25 January 2022       Accepted ※ 06 February 2022       Issue date ※ 11 February 2022
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WEPV018 The Linac4 Source Autopilot controls, framework, linac, status 665
  • M. Peryt, M. Hrabia, D. Noll, R. Scrivens
    CERN, Geneva, Switzerland
  The Linac4 source is a 2MHz, RF driven, H ion source, using caesium injection to enhance H production and lower the electron to H ratio. The source operates with 800µs long pulses at 1.2 second intervals. The stability of the beam intensity from the source requires adjustment of parameters like RF power used for plasma heating. The Linac4 Source Autopilot improves the stability and uptime of the source, by using high-level automation to monitor and control Device parameters of the source, in a time range of minutes to days. This paper describes the Autopilot framework, which incorporates standard CERN accelerator Controls infrastructure, and enables users to add domain specific code for their needs. User code typically runs continuously, adapting Device settings based on acquisitions. Typical use cases are slow feedback systems and procedure automation (e.g. resetting equipment). The novelty of the Autopilot is the successful integration of the Controls software based predominantly on Java technologies, with domain specific user code written in Python. This allows users to leverage a robust Controls infrastructure, with minimal effort, using the agility of the Python ecosystem.  
poster icon Poster WEPV018 [4.371 MB]  
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About • Received ※ 10 October 2021       Revised ※ 19 October 2021       Accepted ※ 22 December 2021       Issue date ※ 31 December 2021
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THPV011 Notifications with Native Mobile Application site, controls, EPICS, software 883
  • B. Bertrand, J. Forsberg
    MAX IV Laboratory, Lund University, Lund, Sweden
  • E. Laface, G. Weiss
    ESS, Lund, Sweden
  Notifications are an essential part of any control system. Many people want to be notified of specific events. There are several ways to send notifications: SMS, e-mails or messaging applications like Slack and Telegram are some common ones. Those solutions frequently require some central configuration to record who will receive messages, which is difficult to maintain. ESS developed a native mobile application, both for iOS and Android, to manage notifications. The application allows the users to subscribe to the topics they are interested in, removing the need for a central configuration. A web server is used as gateway to send all notifications following Apple and Google protocols. This server exposes a REST API that is used both by clients to send messages and mobile applications to retrieve and manage those messages. This paper will detail the technical implementation as well as the lessons learnt from this approach.  
poster icon Poster THPV011 [6.079 MB]  
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About • Received ※ 09 October 2021       Accepted ※ 21 November 2021       Issue date ※ 05 January 2022  
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