Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA

H. Ego; H. Maesaka; Y. Otake; T. Sakurai; T. Hashirano; S. Miura

Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA

H. Ego, H. Maesaka, Y. Otake, T. Sakurai, T. Hashirano, S. Miura

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In SPring-8, the 8 GeV compact XFEL "SACLA" is under commissioning. A single bunch of electrons is compressed down to about 30 fs for brilliant SASE X-ray lasing. It is an important key of stable lasing to investigate the longitudinal phase space and the sliced emittance of a lasing part of the bunch by using a transverse RF deflector. We developed a high gradient C-band deflecting structure operated at 5712 MHz for the bunch diagnosis with a resolution on a femtosecond scale in a limited space in SACLA. The backward travelling-wave of the HEM11-5π/6 mode is excited in the cylindrical structure periodically loaded with racetrack-shaped irises. The featuring irises suppress rotation of the deflection plane and generate strong cell-to-cell coupling for stable resonance. Two 1.8m-long structures were fabricated and installed in SACLA. They successfully generated a deflection voltage of 60 MV and pitched the bunch at the zero-crossing RF phase.

Original language	English
Title of host publication	IPAC 2011 - 2nd International Particle Accelerator Conference
Pages	1221-1223
Number of pages	3
Publication status	Published - 2011 Dec 1
Externally published	Yes
Event	2nd International Particle Accelerator Conference, IPAC 2011 - Kursaal, San Sebastian, Spain Duration: 2011 Sep 4 → 2011 Sep 9

Publication series

Name	IPAC 2011 - 2nd International Particle Accelerator Conference

Other

Other	2nd International Particle Accelerator Conference, IPAC 2011
Country	Spain
City	Kursaal, San Sebastian
Period	11/9/4 → 11/9/9

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA. / Ego, H.; Maesaka, H.; Otake, Y.; Sakurai, T.; Hashirano, T.; Miura, S.

IPAC 2011 - 2nd International Particle Accelerator Conference. 2011. p. 1221-1223 (IPAC 2011 - 2nd International Particle Accelerator Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ego, H, Maesaka, H, Otake, Y, Sakurai, T, Hashirano, T & Miura, S 2011, Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA. in IPAC 2011 - 2nd International Particle Accelerator Conference. IPAC 2011 - 2nd International Particle Accelerator Conference, pp. 1221-1223, 2nd International Particle Accelerator Conference, IPAC 2011, Kursaal, San Sebastian, Spain, 11/9/4.

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title = "Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 {"}SACLA",

abstract = "In SPring-8, the 8 GeV compact XFEL {"}SACLA{"} is under commissioning. A single bunch of electrons is compressed down to about 30 fs for brilliant SASE X-ray lasing. It is an important key of stable lasing to investigate the longitudinal phase space and the sliced emittance of a lasing part of the bunch by using a transverse RF deflector. We developed a high gradient C-band deflecting structure operated at 5712 MHz for the bunch diagnosis with a resolution on a femtosecond scale in a limited space in SACLA. The backward travelling-wave of the HEM11-5π/6 mode is excited in the cylindrical structure periodically loaded with racetrack-shaped irises. The featuring irises suppress rotation of the deflection plane and generate strong cell-to-cell coupling for stable resonance. Two 1.8m-long structures were fabricated and installed in SACLA. They successfully generated a deflection voltage of 60 MV and pitched the bunch at the zero-crossing RF phase.",

author = "H. Ego and H. Maesaka and Y. Otake and T. Sakurai and T. Hashirano and S. Miura",

year = "2011",

month = dec,

day = "1",

language = "English",

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series = "IPAC 2011 - 2nd International Particle Accelerator Conference",

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note = "2nd International Particle Accelerator Conference, IPAC 2011 ; Conference date: 04-09-2011 Through 09-09-2011",

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T1 - Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA

AU - Ego, H.

AU - Maesaka, H.

AU - Otake, Y.

AU - Sakurai, T.

AU - Hashirano, T.

AU - Miura, S.

PY - 2011/12/1

Y1 - 2011/12/1

N2 - In SPring-8, the 8 GeV compact XFEL "SACLA" is under commissioning. A single bunch of electrons is compressed down to about 30 fs for brilliant SASE X-ray lasing. It is an important key of stable lasing to investigate the longitudinal phase space and the sliced emittance of a lasing part of the bunch by using a transverse RF deflector. We developed a high gradient C-band deflecting structure operated at 5712 MHz for the bunch diagnosis with a resolution on a femtosecond scale in a limited space in SACLA. The backward travelling-wave of the HEM11-5π/6 mode is excited in the cylindrical structure periodically loaded with racetrack-shaped irises. The featuring irises suppress rotation of the deflection plane and generate strong cell-to-cell coupling for stable resonance. Two 1.8m-long structures were fabricated and installed in SACLA. They successfully generated a deflection voltage of 60 MV and pitched the bunch at the zero-crossing RF phase.

AB - In SPring-8, the 8 GeV compact XFEL "SACLA" is under commissioning. A single bunch of electrons is compressed down to about 30 fs for brilliant SASE X-ray lasing. It is an important key of stable lasing to investigate the longitudinal phase space and the sliced emittance of a lasing part of the bunch by using a transverse RF deflector. We developed a high gradient C-band deflecting structure operated at 5712 MHz for the bunch diagnosis with a resolution on a femtosecond scale in a limited space in SACLA. The backward travelling-wave of the HEM11-5π/6 mode is excited in the cylindrical structure periodically loaded with racetrack-shaped irises. The featuring irises suppress rotation of the deflection plane and generate strong cell-to-cell coupling for stable resonance. Two 1.8m-long structures were fabricated and installed in SACLA. They successfully generated a deflection voltage of 60 MV and pitched the bunch at the zero-crossing RF phase.

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BT - IPAC 2011 - 2nd International Particle Accelerator Conference

T2 - 2nd International Particle Accelerator Conference, IPAC 2011

Y2 - 4 September 2011 through 9 September 2011

ER -