ICALEPCS2015 - List of Authors (Toyoda, A.)

Paper	Title	Page
MOM309	Upgrade of the Beam Monitor System for Hadron Experimental Facility at J-PARC	86
	Y. Morino, K. Agari, Y. Sato, A. Toyoda KEK, Tsukuba, Japan
	Hadron experimental facility(HD hall) at Japan Proton Accelerator Research Complex (J-PARC) is designed to provide high intensity beam for particle and nuclear physics. Slow-extracted proton beam(2 second spill per 6 seconds) from main ring is injected to a production target at the HD hall. On May 2013, proton beam was instantaneously extracted to the HD hall in 5 milliseconds. The short pulse beam melted the production target. After the accident, the beam operation was stopped at the HD hall. For the recovery of the HD hall, we upgraded the beam line of the HD hall in many aspects to sustain the abnormal beam injection. The monitor system of the beam line was also upgraded to detect the abnormal beam injection. The rate monitor of second particles from the target was prepared to detect short pulse injection. The beam profile monitor was upgraded to measure at several times during one pulse to detect a sudden change of the beam profile. The beam loss monitor was upgraded to read out always to detect unexpected high intensity beam promptly. These signals were included in the interlock system. In this paper, the detail of the beam monitor system upgrade will be reported.
	Slides MOM309 [1.984 MB]
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MOPGF123	Upgrades of Temperature Measurements and Interlock System for the Production Target at J-PARC Hadoron Experimental Facility	371
	K. Agari, Y. Morino, Y. Sato, A. Toyoda KEK, Tsukuba, Japan
	Funding: This work was supported by Grant-in-Aid (No. 26800153) for Young Scientists (B) of the Japan Ministry of Education, Culture, Sports, Science and Technology [MEXT]. Hadron experimental facility is designed to handle intense slow-extraction proton beam from Main Ring (MR) of Japan Proton Accelerator Research Complex (J-PARC). On May 23, 2013, 2×10¹³ proton beams were instantaneously extracted to Hadron experimental facility in 5 milliseconds due to the malfunction of the power supply for Extraction Quadrapole magnet for a spill feedback at MR. Therefore the production target made of gold was locally damaged at Hadron experimental facility because of overheat by absorbing proton beam. After the accident we upgraded target temperature measurements with 100 milliseconds sampling and synchronization with beam spills in order to promptly detect damage to the production target as soon as possible. In addition, we also upgraded temperature trend graphs and an interlock system in order to figure out the state of the production target. Currently Hadron experimental facility ready to accept slow-extraction proton beam. The results of the temperature measurements and the interlock system for the production target during beam operation at J-PARC Hadron experimental facility, will be reported in this paper.
	Poster MOPGF123 [0.501 MB]
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Paper

Title

Page

Upgrade of the Beam Monitor System for Hadron Experimental Facility at J-PARC

86

Y. Morino, K. Agari, Y. Sato, A. Toyoda
KEK, Tsukuba, Japan

Hadron experimental facility(HD hall) at Japan Proton Accelerator Research Complex (J-PARC) is designed to provide high intensity beam for particle and nuclear physics. Slow-extracted proton beam(2 second spill per 6 seconds) from main ring is injected to a production target at the HD hall. On May 2013, proton beam was instantaneously extracted to the HD hall in 5 milliseconds. The short pulse beam melted the production target. After the accident, the beam operation was stopped at the HD hall. For the recovery of the HD hall, we upgraded the beam line of the HD hall in many aspects to sustain the abnormal beam injection. The monitor system of the beam line was also upgraded to detect the abnormal beam injection. The rate monitor of second particles from the target was prepared to detect short pulse injection. The beam profile monitor was upgraded to measure at several times during one pulse to detect a sudden change of the beam profile. The beam loss monitor was upgraded to read out always to detect unexpected high intensity beam promptly. These signals were included in the interlock system. In this paper, the detail of the beam monitor system upgrade will be reported.

Slides MOM309 [1.984 MB]

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MOPGF123

Upgrades of Temperature Measurements and Interlock System for the Production Target at J-PARC Hadoron Experimental Facility

371

K. Agari, Y. Morino, Y. Sato, A. Toyoda
KEK, Tsukuba, Japan

Funding: This work was supported by Grant-in-Aid (No. 26800153) for Young Scientists (B) of the Japan Ministry of Education, Culture, Sports, Science and Technology [MEXT].
Hadron experimental facility is designed to handle intense slow-extraction proton beam from Main Ring (MR) of Japan Proton Accelerator Research Complex (J-PARC). On May 23, 2013, 2×10¹³ proton beams were instantaneously extracted to Hadron experimental facility in 5 milliseconds due to the malfunction of the power supply for Extraction Quadrapole magnet for a spill feedback at MR. Therefore the production target made of gold was locally damaged at Hadron experimental facility because of overheat by absorbing proton beam. After the accident we upgraded target temperature measurements with 100 milliseconds sampling and synchronization with beam spills in order to promptly detect damage to the production target as soon as possible. In addition, we also upgraded temperature trend graphs and an interlock system in order to figure out the state of the production target. Currently Hadron experimental facility ready to accept slow-extraction proton beam. The results of the temperature measurements and the interlock system for the production target during beam operation at J-PARC Hadron experimental facility, will be reported in this paper.

Poster MOPGF123 [0.501 MB]

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