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A. Fukasawa

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Last Name: Fukasawa

Full Name: A. Fukasawa

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2 papers

title: The FINDER Photoinjector

format: journal article

year: 2007

6 authors: A. Fukasawa | H. Badakov | B. D. O'Shea | E. Hemsing | J. B. Rosenzweig | S. G. Anderson

abstract: The FINDER photoinjector was developed for the inverse Compton scattering experiment under UCLA- LLNL collaboration. The improvements of this gun from SPARC gun [1, 2] at INFN-LNF (Frascati) and previous UCLA versions of the 1.6 cell S-band photoinjector are detailed here. The gun is designed to have large mode separation to suppress 0 mode excitation which may be a cause of the emittance degradation. In an effort to reduce the RF quadrupole effect the full cell tuners are replaced by vacuum ports. The laser ports are also omitted. Two openings of the solenoid shield are added to top and bottom of it where there were only two openings on the sides. S11 of the cavity was presented. The on-axis electric field was measured by the bead drop method to show the good field balance. The magnetic field in the emittance compensation solenoid was measured and the quadrupole components were derived.

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title: Commissioning of a High-Brightness Photoinjector for Compton Scattering X-Ray Sources

format: journal article

year: 2007

13 authors: S. G. Anderson | C. P. J. Barty | D. J. Gibson | F. V. Hartemann | M. Messerly | M. Shverdin | C. W. Siders | A. M. Tremaine | H. Badakov | P. Frigola | A. Fukasawa | B. OShea | J. B. Rosenzweig

abstract: Compton scattering of intense laser pulses with ultra- relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV ener- gies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free- electron lasers and laser and plasma based advanced accel- erators. We describe the development and commissioning of a 1.6 cell RF photoinjector for use in Compton scatter- ing experiments at LLNL. Injector development issues such as RF cavity design, beam dynamics simulations, emit- tance diagnostic development, results of sputtered magne- sium photo-cathode experiments, and UV laser pulse shap- ing are discussed. Initial operation of the photoinjector is described.

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title:	The FINDER Photoinjector
format:	journal article
year:	2007
6 authors:	A. Fukasawa \| H. Badakov \| B. D. O'Shea \| E. Hemsing \| J. B. Rosenzweig \| S. G. Anderson
abstract:	The FINDER photoinjector was developed for the inverse Compton scattering experiment under UCLA- LLNL collaboration. The improvements of this gun from SPARC gun [1, 2] at INFN-LNF (Frascati) and previous UCLA versions of the 1.6 cell S-band photoinjector are detailed here. The gun is designed to have large mode separation to suppress 0 mode excitation which may be a cause of the emittance degradation. In an effort to reduce the RF quadrupole effect the full cell tuners are replaced by vacuum ports. The laser ports are also omitted. Two openings of the solenoid shield are added to top and bottom of it where there were only two openings on the sides. S11 of the cavity was presented. The on-axis electric field was measured by the bead drop method to show the good field balance. The magnetic field in the emittance compensation solenoid was measured and the quadrupole components were derived.
keywords:	pbpl
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title:	Commissioning of a High-Brightness Photoinjector for Compton Scattering X-Ray Sources
format:	journal article
year:	2007
13 authors:	S. G. Anderson \| C. P. J. Barty \| D. J. Gibson \| F. V. Hartemann \| M. Messerly \| M. Shverdin \| C. W. Siders \| A. M. Tremaine \| H. Badakov \| P. Frigola \| A. Fukasawa \| B. OShea \| J. B. Rosenzweig
abstract:	Compton scattering of intense laser pulses with ultra- relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV ener- gies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free- electron lasers and laser and plasma based advanced accel- erators. We describe the development and commissioning of a 1.6 cell RF photoinjector for use in Compton scatter- ing experiments at LLNL. Injector development issues such as RF cavity design, beam dynamics simulations, emit- tance diagnostic development, results of sputtered magne- sium photo-cathode experiments, and UV laser pulse shap- ing are discussed. Initial operation of the photoinjector is described.
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Download \| View \| Details \| edit \| delete

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