<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>CeB</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>electron gun for low-emittance injector

Togawa, Kazuaki; Shintake, T.; Inagaki, Terumi; Onoe, K.; Tanaka, Takashi; Baba, H.; Matsumoto, Hiroshi

doi:10.1103/physrevstab.10.020703

Cited by 85 publications

(64 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several schemes for generation of low emittance beams are being pursued (e.g., the XFEL project at SPring-8 plans to use a high-voltage pulsed electron gun with a single-crystal CeB 6 cathode to generate low emittance beam [8]; a field-emitter array is also considered promising for generation of low emittance beam [9]) with the most popular way being utilization of the photocathode radio-frequency (rf) gun.…”

Section: Introductionmentioning

confidence: 99%

Transverse phase space tomography using a solenoid applied to a thermal emittance measurement

Xiang

Yan

et al. 2009

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

Recently, Stratakis and collaborators performed the tomographic phase space mapping of intense particle beams in the energy range of a few keV using a pair of solenoids [D. Stratakis et al., Phys. Plasmas 14, 120703 (2007)]. In this paper, we report the tomographic phase space mapping for the relativistic electron beam from a photocathode radio-frequency gun using a single solenoid at an energy of a few MeV. The experiment is conducted at a very low charge level aiming at mapping the phase space distributions of thermal emittance dominated beam. The phase space distribution is reconstructed with the algebraic reconstruction technique using the 14 beam profiles measured under various solenoid currents. Results from the computerized tomography (CT) technique are in good agreement with that from the solenoid scan method. The reconstructed phase space from the CT technique is further analyzed and shows a stochastic distribution which is a strong confirmation for the measurement of thermal emittance. Details on measurement principles and experimental implementation of the CT technique and solenoid scan method are presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Transverse phase space tomography using a solenoid applied to a thermal emittance measurement

Xiang

Yan

et al. 2009

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

show abstract

“…The electron gun with a CeB 6 thermionic cathode launches a microsecond electron pulse with an energy of 500 keV and a peak current of 1 A at a repetition rate of 60 Hz (Togawa et al, 2007). A central part of 1 ns is cut out from the microsecond pulse using a beam chopper followed by the buncher section that consists of a 238 MHz pre-buncher and a 476 MHz booster (Shintake et al, 2009).…”

Section: Light Sourcementioning

confidence: 99%

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

et al. 2018

View full text Add to dashboard Cite

The design and performance of a soft X-ray free-electron laser (FEL) beamline of the SPring-8 Compact free-electron LAser (SACLA) are described. The SPring-8 Compact SASE Source test accelerator, a prototype machine of SACLA, was relocated to the SACLA undulator hall for dedicated use for the soft X-ray FEL beamline. Since the accelerator is operated independently of the SACLA main linac that drives the two hard X-ray beamlines, it is possible to produce both soft and hard X-ray FEL simultaneously. The FEL pulse energy reached 110 mJ at a wavelength of 12.4 nm (i.e. photon energy of 100 eV) with an electron beam energy of 780 MeV.

show abstract

“…Electron bunches are generated at the pulsed thermionic electron gun with a CeB 6 single crystal cathode [14] with a repetition rate of 30 Hz. The electron bunches are mainly compressed through a velocity bunching process in the RF bunch compressor cavities and accelerated by a C-band high-gradient Linac up to 250 MeV.…”

Section: Scss Prototype Accelerator and Operation Parameters For Seedingmentioning

confidence: 99%

Stabilization of a high-order harmonic generation seeded extreme ultraviolet free electron laser by time-synchronization control with electro-optic sampling

Tomizawa

Sato

Ogawa

et al. 2015

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

A fully coherent free electron laser (FEL) seeded with a higher-order harmonic (HH) pulse from high-order harmonic generation (HHG) is successfully operated for a sufficiently prolonged time in pilot user experiments by using a timing drift feedback. For HHG-seeded FELs, the seeding laser pulses have to be synchronized with electron bunches. Despite seeded FELs being non-chaotic light sources in principle, external laser-seeded FELs are often unstable in practice because of a timing jitter and a drift between the seeding laser pulses and the accelerated electron bunches. Accordingly, we constructed a relative arrival-timing monitor based on non-invasive electro-optic sampling (EOS). The EOS monitor made uninterrupted shot-to-shot monitoring possible even during the seeded FEL operation. The EOS system was then used for arrival-timing feedback with an adjustability of 100 fs for continual operation of the HHG-seeded FEL. Using the EOS-based beam drift controlling system, the HHG-seeded FEL was operated over half a day with an effective hit rate of 20%-30%. The output pulse energy was 20 µJ at the 61.2 nm wavelength. Towards seeded FELs in the water window region, we investigated our upgrade plan to seed high-power FELs with HH photon energy of 30-100 eV and lase at shorter wavelengths of up to 2 nm through high-gain harmonic generation (HGHG) at the energy-upgraded SPring-8 Compact SASE Source (SCSS) accelerator. We studied a benefit as well as the feasibility of the next HHG-seeded FEL machine with single-stage HGHG with tunability of a lasing wavelength.

show abstract

CeB6electron gun for low-emittance injector

Cited by 85 publications

References 6 publications

Transverse phase space tomography using a solenoid applied to a thermal emittance measurement

Transverse phase space tomography using a solenoid applied to a thermal emittance measurement

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

Stabilization of a high-order harmonic generation seeded extreme ultraviolet free electron laser by time-synchronization control with electro-optic sampling

Contact Info

Product

Resources

About