IPAC2019 - Classification: MC6: Beam Instrumentation, Controls, Feedback and Operational Aspects / T22 Reliability and Operability

Paper	Title	Page
THYYPLS3	A Remote-Controlled Robot-Car in the TPS Tunnel	3435
	T.Y. Lee, B.Y. Chen, T.W. Hsu, B.Y. Huang, C.H. Kuo, W.Y. Lin NSRRC, Hsinchu, Taiwan
	A remote-controlled robot-car named ’PhotonBot’ was put into the TPS accelerator tunnel and is equipped with a 360 degrees LiDAR for SLAM and navigation, two cameras for perception and first-person view, and a thermal imaging system. The robot can be remotely controlled and can send data to a remote PC through Wi-Fi. With SLAM, it can go more freely without being restricted to a designated path. In order to ensure it can work continuously, there is a wireless charging station in case of a low battery.
	Slides THYYPLS3 [18.013 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THYYPLS3
About •	paper received ※ 09 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPGW096	CERN Accelerator Operation’s Planning Manager and Dashboard	3792
	E. Matli, T. Hesselberg, J.N. Nielsen CERN, Geneva, Switzerland T. Hesselberg NTNU, Trondheim, Norway
	Running CERN complex of accelerators and infrastructure requires the seamless collaboration of many people, such as operators, experts and people-on-call to name only a few. Distributed in teams from different groups, it is important to centralise schedule planning and operational information and make this information readily available. In BE/OP these tasks are handled by two applications to manage shift work as well as piquet and expert services. At the beginning of 2018, a project was started to replace the ageing web piquet application. While collecting requirements we realised a more flexible application was needed to suit a broader set of customers, and to offer a more generic, people- oriented tool. The new planning tool consists of two separate applications: The Planning Manager, which is used to organise work schedules of a teams members, and to keep each group’s planning up-to-date, coherently, and visible to all involved. The Planning Dashboard, which allows any user to create a customised view of the available services they use.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW096
About •	paper received ※ 02 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPRB003	Automatic Classification of Post Mortem Data for Reduced Beam Down Time	3799
	M.C. Chalmers, Y.E. Tan AS - ANSTO, Clayton, Australia
	Time spent recovering from faults that result in a rapid loss of stored current (a total beam loss event) can be costly to the Australian Synchrotron facility and its researchers. The identification of a fault leading to total beam loss is assisted by a large variety of investigative tools for specific tasks, but they do not often give a thorough overview of all systems required to store beam. Post mortem data uniquely provides insight into how the beam was behaving at the specific time the dump occurred. With machine learning, we find that we can automatically and rapidly identify many types of total beam loss events by learning about the unique characteristics in the post mortem files.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB003
About •	paper received ※ 15 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRB072	Operational Experience of a Prototype LHC Injection Kicker Magnet with a Low SEY Coating and Redistributed Power Deposition	3974
	M.J. Barnes, C. Bracco, G. Bregliozzi, A. Chmielinska, L. Ducimetière, B. Goddard, G. Iadarola, T. Kramer, V. Vlachodimitropoulos, W.J.M. Weterings CERN, Geneva, Switzerland A. Chmielinska EPFL, Lausanne, Switzerland L. Vega Cid ETSII UPM, Madrid, Spain
	Funding: This research was supported by the HL-LHC project In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit HL-LHC operation for a few hundred hours due to dynamic vacuum activity. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of UFOs, and which is compatible with the high voltage environment, was included in a prototype MKI installed in the LHC during the 2017-18 Year End Technical Stop. In addition, this MKI included an upgrade to relocate a significant portion of beam induced power from the yoke to a ’damping element’: this element is not at pulsed high voltage. The effectiveness of the upgrades has been demonstrated during LHC operation, hence a future version will include water cooling of this ’damping element’. This paper reviews dynamic vacuum around the MKIs and summarizes operational experience of the upgraded MKI.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB072
About •	paper received ※ 08 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRB117	Stability and Reliability Issues of PAL-XFEL Modulator	4096
	S.H. Kim, H.-S. Kang, K.H. Kim, H.-S. Lee, C.-K. Min, S.S. Park, Y.J. Park PAL, Pohang, Kyungbuk, Republic of Korea
	Funding: This work is supported by Ministry of Science, ICT(Information/Communication Technology) and Future Planning. The Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) employs 51 units of the pulse modulator in order to obtain the 10 GeV electron beam, which drive one X-band to linearize and 50 S-band klystrons. The PAL-XFEL requires very tight control of the klystron RF phase jitter 0.03-degree for S-band RF, 0.1-degree for X-band RF and the beam voltage stability of below 50 ppm. The RF phase jitter is directly related to the amplitude stability of modulator output pulses. There are several factors to satisfy the stability and reliability for the PAL-XFEL modulator. The largest sources of pulse-to-pulse instability are a current charging power supply (CCPS) for PFN charging, a thyratron switch, and a klystron focusing magnet power supply (MPS). In this paper, the operation and debugging results of those devices are described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB117
About •	paper received ※ 16 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A Remote-Controlled Robot-Car in the TPS Tunnel

3435

T.Y. Lee, B.Y. Chen, T.W. Hsu, B.Y. Huang, C.H. Kuo, W.Y. Lin
NSRRC, Hsinchu, Taiwan

A remote-controlled robot-car named ’PhotonBot’ was put into the TPS accelerator tunnel and is equipped with a 360 degrees LiDAR for SLAM and navigation, two cameras for perception and first-person view, and a thermal imaging system. The robot can be remotely controlled and can send data to a remote PC through Wi-Fi. With SLAM, it can go more freely without being restricted to a designated path. In order to ensure it can work continuously, there is a wireless charging station in case of a low battery.

Slides THYYPLS3 [18.013 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THYYPLS3

About •

paper received ※ 09 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPGW096

CERN Accelerator Operation’s Planning Manager and Dashboard

3792

E. Matli, T. Hesselberg, J.N. Nielsen
CERN, Geneva, Switzerland
T. Hesselberg
NTNU, Trondheim, Norway

Running CERN complex of accelerators and infrastructure requires the seamless collaboration of many people, such as operators, experts and people-on-call to name only a few. Distributed in teams from different groups, it is important to centralise schedule planning and operational information and make this information readily available. In BE/OP these tasks are handled by two applications to manage shift work as well as piquet and expert services. At the beginning of 2018, a project was started to replace the ageing web piquet application. While collecting requirements we realised a more flexible application was needed to suit a broader set of customers, and to offer a more generic, people- oriented tool. The new planning tool consists of two separate applications: The Planning Manager, which is used to organise work schedules of a teams members, and to keep each group’s planning up-to-date, coherently, and visible to all involved. The Planning Dashboard, which allows any user to create a customised view of the available services they use.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW096

About •

paper received ※ 02 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRB003

Automatic Classification of Post Mortem Data for Reduced Beam Down Time

3799

M.C. Chalmers, Y.E. Tan
AS - ANSTO, Clayton, Australia

Time spent recovering from faults that result in a rapid loss of stored current (a total beam loss event) can be costly to the Australian Synchrotron facility and its researchers. The identification of a fault leading to total beam loss is assisted by a large variety of investigative tools for specific tasks, but they do not often give a thorough overview of all systems required to store beam. Post mortem data uniquely provides insight into how the beam was behaving at the specific time the dump occurred. With machine learning, we find that we can automatically and rapidly identify many types of total beam loss events by learning about the unique characteristics in the post mortem files.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB003

About •

paper received ※ 15 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRB072

Operational Experience of a Prototype LHC Injection Kicker Magnet with a Low SEY Coating and Redistributed Power Deposition

3974

M.J. Barnes, C. Bracco, G. Bregliozzi, A. Chmielinska, L. Ducimetière, B. Goddard, G. Iadarola, T. Kramer, V. Vlachodimitropoulos, W.J.M. Weterings
CERN, Geneva, Switzerland
A. Chmielinska
EPFL, Lausanne, Switzerland
L. Vega Cid
ETSII UPM, Madrid, Spain

Funding: This research was supported by the HL-LHC project
In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit HL-LHC operation for a few hundred hours due to dynamic vacuum activity. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of UFOs, and which is compatible with the high voltage environment, was included in a prototype MKI installed in the LHC during the 2017-18 Year End Technical Stop. In addition, this MKI included an upgrade to relocate a significant portion of beam induced power from the yoke to a ’damping element’: this element is not at pulsed high voltage. The effectiveness of the upgrades has been demonstrated during LHC operation, hence a future version will include water cooling of this ’damping element’. This paper reviews dynamic vacuum around the MKIs and summarizes operational experience of the upgraded MKI.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB072

About •

paper received ※ 08 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRB117

Stability and Reliability Issues of PAL-XFEL Modulator

4096

S.H. Kim, H.-S. Kang, K.H. Kim, H.-S. Lee, C.-K. Min, S.S. Park, Y.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea

Funding: This work is supported by Ministry of Science, ICT(Information/Communication Technology) and Future Planning.
The Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) employs 51 units of the pulse modulator in order to obtain the 10 GeV electron beam, which drive one X-band to linearize and 50 S-band klystrons. The PAL-XFEL requires very tight control of the klystron RF phase jitter 0.03-degree for S-band RF, 0.1-degree for X-band RF and the beam voltage stability of below 50 ppm. The RF phase jitter is directly related to the amplitude stability of modulator output pulses. There are several factors to satisfy the stability and reliability for the PAL-XFEL modulator. The largest sources of pulse-to-pulse instability are a current charging power supply (CCPS) for PFN charging, a thyratron switch, and a klystron focusing magnet power supply (MPS). In this paper, the operation and debugging results of those devices are described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB117

About •

paper received ※ 16 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)