The operation of the BNL/ATF GUN-IV photocathode RF gun at the Advanced Photon Source

Biedron, Sandra; Goeppner, G.; Lewellen, John W.; Milton, S. V.; Nassiri, A.; Travish, G.; Wang, X.J.; Arnold, N. D.; Berg, William J.; Babzien, M.; Doose, C.; Dortwegt, R.; Grelick, A.; Galayda, J.; Markovich, G.M.; Pasky, S.; Power, John; Ye, Bo

doi:10.1109/pac.1999.794360

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…This first LEUTL experiment is often referred to as the APS SASE FEL and utilizes a string of undulators that are similar to those found in the APS storage ring, each having an undulator parameter K of 3.1, a period of 3.3 cm, and a length of 2.4 m. LEUTL presently (Fall 2000) employs nine identical undulators spaced by ≅ 0.38 m. This space contains a combined function dipole-corrector and quadrupole magnet, electron beam diagnostics, and optical beam diagnostics [18]. LEUTL uses a photocathode-rf gun [19] and drive-laser system [20] to generate electrons that are further accelerated through the APS linear accelerator (linac) [21]. (Note: this linac is also used as part of the injector system to the APS storage ring.)…”

Section: Possible Experimental Layoutmentioning

confidence: 96%

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

Biedron

Dattoli

Fawley

et al. 2001

AIP Conference Proceedings

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Abstract. Wakefield effects due to internal vacuum chamber roughness may increase the electron beam energy spread and so have become an immediate concern for future x-ray free-electron laser (FEL) project developments such as the SLAC Linac Coherent Light Source (LCLS) and the DESY TESLA x-ray FEL. We describe a possible experiment to characterize the effects of surface roughness on an FEL driven by self-amplified spontaneous emission (SASE) operation. Although the specific system described is not completely identical to the above-proposed projects, much useful scaling information could be obtained and applied to shorter wavelength systems.

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Section: Possible Experimental Layoutmentioning

confidence: 96%

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

Biedron

Dattoli

Fawley

et al. 2001

AIP Conference Proceedings

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“…The APS linear accelerator has three electron guns: the photocathode-rf gun, used for LEUTL operation or storage-ring operation, and two thermionic-rf guns, used for storage-ring operation and for diagnostic check-out through the LEUTL line. The 2856-MHz APS linear accelerator is capable of accelerating electrons from the photocathode-rf gun to nearly 600 MeV [5,6], and incorporates a magnetic bunch compressor can compress the electron pulses down to a few hundred fs [7]. The chosen-energy electron beam is then transported through a transfer line from the linear accelerator to the LEUTL tunnel proper.…”

Section: The Low-energy Undulator Test Line (Leutl)mentioning

confidence: 99%

The Low-Energy Undulator Test Line: A SASE FEL Operating from 660 to 130 nm

Biedron¹,

Borland²,

Hartog³

et al. 2002

AIP Conference Proceedings

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Abstract. There is a strong desire for short wavelength (down to 1 Å), short pulsewidth (<100 fs), high-brightness, transverse, and longitudinally coherent light pulses for use by the synchrotron radiation community. Much effort is ongoing worldwide to advance this desire both experimentally, in theory and design, and politically. One of the ongoing experimental efforts is the low-energy undulator test line (LEUTL) at the Advanced Photon Source (APS) at Argonne National Laboratory (ANL). This experiment is based upon the self-amplified spontaneous emission (SASE) process, a method to attain a next-generation light source. This presentation gives an overview concerning the history and results of next-generation light sources, the results of the LEUTL SASE FEL, and the description of the upcoming first user experiment on LEUTL. We will also briefly review exotic schemes for future, next-generation light sources based upon FELs including biharmonic undulators and the possibility of interfacing of traditional x-ray lasers with FELs.

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“…The injector is perfectly suitable for machine projects requiring a high average beam power. Furthermore, the performance of the injector matches with that of the best photocathode rf gun based injector design in many cases [8].…”

Section: Discussionmentioning

confidence: 68%

High brightness injectors based on photocathode dc gun

Yunn

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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Sample results of new injector design method based on a photocathode dc gun are presented, based on other work analytically proving the validity of the emittance compensation scheme for the case even when beam bunching is involved. We have designed several new injectors appropriate for different bunch charge ranges accordingly. Excellent beam quality produced by these injectors clearly shows that a photocathode dc gun can compete with a rf gun on an equal footing as the source of an electron beam for the bunch charge ranging up to 2 nano Coulomb (nC). This work therefore elevates a dc gun based injector to the preferred choice for many ongoing high brightness accelerator projects considering the proven operational stability and high average power capability of the dc gun.

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The operation of the BNL/ATF GUN-IV photocathode RF gun at the Advanced Photon Source

Cited by 10 publications

References 7 publications

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

The Low-Energy Undulator Test Line: A SASE FEL Operating from 660 to 130 nm

High brightness injectors based on photocathode dc gun

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