Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection

P. J. Phillips; W. Allan Gillespie; B. Steffen; E. A. Knabbe; B. Schmidt; P. Schmüser; S. P. Jamison; G. Berden; A. F. G. van der Meer; Allan M. MacLeod

Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection

P. J. Phillips
, W. Allan Gillespie
, B. Steffen
, E. A. Knabbe
, B. Schmidt
, P. Schmüser
, S. P. Jamison
, G. Berden
, A. F. G. van der Meer
, Allan M. MacLeod

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

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Abstract

For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic measurement system to probe the time structure of the electric field of single ~100 fs electron bunches. In this technique, the field induced birefringence in an electro-optic crystal is encoded on a chirped picosecond laser pulse. The longitudinal electric field profile of the electron bunch is then obtained from the encoded optical pulse by a single shot cross correlation with a 35 fs laser pulse using a second harmonic crystal (temporal decoding). An electro-optical signal exhibiting a feature with 118 fs FWHM was observed, and this is close to the limit of resolution due to the material properties of the particular electro-optic crystal used. The measured electro-optic signals are compared to bunch shapes simultaneously measured with a transverse deflecting cavity.

Original language	English
Title of host publication	Proceedings of DIPAC 2007
Editors	Ivan Andrian, Volker R. W. Schaa
Publisher	DIPAC
Pages	221-223
Number of pages	3
Publication status	Published - 31 Oct 2008
Event	8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators - NH Laguna Palace, Venice, Italy Duration: 20 May 2007 → 23 May 2007 Conference number: 8 http://accelconf.web.cern.ch/AccelConf/d07/index.htm

Workshop

Workshop	8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators
Abbreviated title	DIPAC 2007
Country/Territory	Italy
City	Venice
Period	20/05/07 → 23/05/07
Internet address	http://accelconf.web.cern.ch/AccelConf/d07/index.htm

Keywords

Electro-optic
Electron bunch diagnostics

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Phillips, P. J., Gillespie, W. A., Steffen, B., Knabbe, E. A., Schmidt, B., Schmüser, P., Jamison, S. P., Berden, G., van der Meer, A. F. G., & MacLeod, A. M. (2008). Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. In I. Andrian, & V. R. W. Schaa (Eds.), Proceedings of DIPAC 2007 (pp. 221-223). DIPAC. http://www.elettra.trieste.it/dipac07/uploads/Main/dipac07-proceedings.pdf

@inproceedings{a829f15d3aa4431eae631d948a7aca6d,

title = "Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection",

abstract = "For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic measurement system to probe the time structure of the electric field of single \textasciitilde{}100 fs electron bunches. In this technique, the field induced birefringence in an electro-optic crystal is encoded on a chirped picosecond laser pulse. The longitudinal electric field profile of the electron bunch is then obtained from the encoded optical pulse by a single shot cross correlation with a 35 fs laser pulse using a second harmonic crystal (temporal decoding). An electro-optical signal exhibiting a feature with 118 fs FWHM was observed, and this is close to the limit of resolution due to the material properties of the particular electro-optic crystal used. The measured electro-optic signals are compared to bunch shapes simultaneously measured with a transverse deflecting cavity.",

author = "Phillips, \{P. J.\} and Gillespie, \{W. Allan\} and B. Steffen and Knabbe, \{E. A.\} and B. Schmidt and P. Schm{\"u}ser and Jamison, \{S. P.\} and G. Berden and \{van der Meer\}, \{A. F. G.\} and MacLeod, \{Allan M.\}",

year = "2008",

month = oct,

day = "31",

language = "English",

pages = "221--223",

editor = "Ivan Andrian and Schaa, \{Volker R. W.\}",

booktitle = "Proceedings of DIPAC 2007",

publisher = "DIPAC",

note = "8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007 ; Conference date: 20-05-2007 Through 23-05-2007",

url = "http://accelconf.web.cern.ch/AccelConf/d07/index.htm",

}

Phillips, PJ, Gillespie, WA, Steffen, B, Knabbe, EA, Schmidt, B, Schmüser, P, Jamison, SP, Berden, G, van der Meer, AFG & MacLeod, AM 2008, Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. in I Andrian & VRW Schaa (eds), Proceedings of DIPAC 2007. DIPAC, pp. 221-223, 8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, Venice, Italy, 20/05/07. <http://www.elettra.trieste.it/dipac07/uploads/Main/dipac07-proceedings.pdf>

TY - GEN

T1 - Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection

AU - Phillips, P. J.

AU - Gillespie, W. Allan

AU - Steffen, B.

AU - Knabbe, E. A.

AU - Schmidt, B.

AU - Schmüser, P.

AU - Jamison, S. P.

AU - Berden, G.

AU - van der Meer, A. F. G.

AU - MacLeod, Allan M.

N1 - Conference code: 8

PY - 2008/10/31

Y1 - 2008/10/31

N2 - For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic measurement system to probe the time structure of the electric field of single ~100 fs electron bunches. In this technique, the field induced birefringence in an electro-optic crystal is encoded on a chirped picosecond laser pulse. The longitudinal electric field profile of the electron bunch is then obtained from the encoded optical pulse by a single shot cross correlation with a 35 fs laser pulse using a second harmonic crystal (temporal decoding). An electro-optical signal exhibiting a feature with 118 fs FWHM was observed, and this is close to the limit of resolution due to the material properties of the particular electro-optic crystal used. The measured electro-optic signals are compared to bunch shapes simultaneously measured with a transverse deflecting cavity.

AB - For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic measurement system to probe the time structure of the electric field of single ~100 fs electron bunches. In this technique, the field induced birefringence in an electro-optic crystal is encoded on a chirped picosecond laser pulse. The longitudinal electric field profile of the electron bunch is then obtained from the encoded optical pulse by a single shot cross correlation with a 35 fs laser pulse using a second harmonic crystal (temporal decoding). An electro-optical signal exhibiting a feature with 118 fs FWHM was observed, and this is close to the limit of resolution due to the material properties of the particular electro-optic crystal used. The measured electro-optic signals are compared to bunch shapes simultaneously measured with a transverse deflecting cavity.

M3 - Conference contribution

SP - 221

EP - 223

BT - Proceedings of DIPAC 2007

A2 - Andrian, Ivan

A2 - Schaa, Volker R. W.

PB - DIPAC

T2 - 8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators

Y2 - 20 May 2007 through 23 May 2007

ER -

Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection

Abstract

Workshop

Keywords

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