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 proceedingConference contribution

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 languageEnglish
Title of host publicationProceedings of DIPAC 2007
EditorsIvan Andrian, Volker R. W. Schaa
PublisherDIPAC
Pages221-223
Number of pages3
StatePublished - 31 Oct 2008
Event8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators - Venice, Italy

Workshop

Workshop8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators
Abbreviated titleDIPAC 2007
CountryItaly
CityVenice
Period20/05/0723/05/07
Internet address

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electro-optics
pulses
crystals
electrons
shot
electric fields
profiles
decoding
high gain
cross correlation
birefringence
optical communication
harmonics
cavities
probes

Cite this

Phillips, P. J., Gillespie, W. A., Steffen, B., Knabbe, E. A., Schmidt, B., Schmüser, P., ... 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.

Phillips, P. J.; Gillespie, W. Allan; Steffen, B.; Knabbe, E. A.; Schmidt, B.; Schmüser, P.; Jamison, S. P.; Berden, G.; van der Meer, A. F. G.; MacLeod, Allan M. / Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection.

Proceedings of DIPAC 2007. ed. / Ivan Andrian; Volker R. W. Schaa. DIPAC, 2008. p. 221-223.

Research output: Chapter in Book/Report/Conference proceedingConference 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.",
author = "Phillips, {P. J.} and Gillespie, {W. Allan} and B. Steffen and Knabbe, {E. A.} and B. Schmidt and P. Schmüser and Jamison, {S. P.} and G. Berden and {van der Meer}, {A. F. G.} and MacLeod, {Allan M.}",
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editor = "Ivan Andrian and Schaa, {Volker R. W.}",
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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, 20-23 May.

Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. / Phillips, P. J.; Gillespie, W. Allan; Steffen, B.; Knabbe, E. A.; Schmidt, B.; Schmüser, P.; Jamison, S. P.; Berden, G.; van der Meer, A. F. G.; MacLeod, Allan M.

Proceedings of DIPAC 2007. ed. / Ivan Andrian; Volker R. W. Schaa. DIPAC, 2008. p. 221-223.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - CHAP

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.

PY - 2008/10/31

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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

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BT - Proceedings of DIPAC 2007

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Phillips PJ, Gillespie WA, Steffen B, Knabbe EA, Schmidt B, Schmüser P et al. Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. In Andrian I, Schaa VRW, editors, Proceedings of DIPAC 2007. DIPAC. 2008. p. 221-223.