Magnet Design and Testing for the 250 MeV Injector of the SwissFEL at the Paul Scherrer Institute

Sanfilippo, S.; Negrazus, M.; Vranković, V.; Сидоров, С. К.; Gabard, A.; Glowa, Natalia Hanna; Kim, Y J; Ganter, R.; Pedrozzi, M.; Braun, H.

doi:10.1109/tasc.2010.2043828

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Apart from the bunch compressor dipole magnets, which are discussed in Sec. IV E, we will not further describe the various magnets used for beam manipulation at the SITF, since in most cases standard electromagnet solutions have been chosen [34,35].…”

Section: Subsystems and Operational Experiencementioning

confidence: 99%

Commissioning experience and beam physics measurements at the SwissFEL Injector Test Facility

Schietinger¹,

Hauff²,

Pal³

et al. 2016

Phys. Rev. Accel. Beams

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The SwissFEL Injector Test Facility operated at the Paul Scherrer Institute between 2010 and 2014, serving as a pilot plant and testbed for the development and realization of SwissFEL, the X-ray Free-Electron Laser facility under construction at the same institute. The test facility consisted of a laser-driven rf electron gun followed by an S-band booster linac, a magnetic bunch compression chicane and a diagnostic section including a transverse deflecting rf cavity. It delivered electron bunches of up to 200 pC charge and up to 250 MeV beam energy at a repetition rate of 10 Hz. The measurements performed at the test facility not only demonstrated the beam parameters required to drive the first stage of an FEL facility, but also led to significant advances in instrumentation technologies, beam characterization methods and the generation, transport and compression of ultra-low-emittance beams. We give a comprehensive overview of the commissioning experience of the principal subsystems and the beam physics measurements performed during the operation of the test facility, including the results of the test of an in-vacuum undulator prototype generating radiation in the vacuum ultraviolet and optical range.

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Section: Subsystems and Operational Experiencementioning

confidence: 99%

Commissioning experience and beam physics measurements at the SwissFEL Injector Test Facility

Schietinger¹,

Hauff²,

Pal³

et al. 2016

Phys. Rev. Accel. Beams

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show abstract

“…The magnetic measurements were done with a 5 axis Hall probe measuring machine [5]. To cover the whole pole area with the measuring arm, it was necessary to measure the field from both sides of the magnet with overlapping field maps.…”

Section: A Measurement Equipment and Setupmentioning

confidence: 99%

Magnetic Measurements and Commissioning of the Fast Ramped 90$^{\circ}$ Bending Magnet in the PROSCAN Gantry 2 Project at PSI

Gabard

Negrazus

Vranković

et al. 2010

IEEE Trans. Appl. Supercond.

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The Paul Scherrer Institute (PSI/Switzerland) is developing, within the PROSCAN project, a new method of proton radiotherapy for treating cancers using a gantry based spot scanning technique for irradiating deep-seated tumors. Among the innovative elements are the laminated magnets in the beam lines, including the newly conceived Gantry 2, that will enable rapid energy changes ( 150 ms) to modulate the range of the scanning pencil beam in three dimensions over the tumor volume. The last and multifunctional 90 bending magnet in the Gantry 2 transport system is not only the largest, but also the most challenging element. The dynamic eddy current effects during ramping were reduced with a special arrangement of laminated parts in the central pole region of the magnet. The construction of the Gantry 2 is finished and the first proton beam reached the treatment area in May 2008. The start of the patient treatment program is planned for the near future. In this paper, the 90 bending magnet construction and the results of the magnetic measurements (both static and dynamic) are presented, together with the commissioning experiences of the Gantry 2 magnet system. The results of the magnetic measurements validated the design, showing a very successful reduction of the eddy current effects so that the fast switching between two treatment energy steps (1 to 2% of the total energy) can be realized in less than 80 ms.

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Magnet Design and Testing for the 250 MeV Injector of the SwissFEL at the Paul Scherrer Institute

Sanfilippo

Negrazus

Vranković

et al. 2010

IEEE Trans. Appl. Supercond.

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The Paul Scherrer Institute (PSI/Switzerland) is planning an X-ray free electron laser facility (SwissFEL) using novel concepts for electron emission, high gradient acceleration and effective bunch compression. Based on a normal-conducting 5.8 GeV linear accelerator, SwissFEL will cover a spectral range of 0.1-7 nm wavelength. An ultra bright electron source was first developed and commissioned in 2008 followed by the construction of a 250 MeV accelerator facility in order to validate the concepts to generate and transport high brightness beams. This facility will be used in the future as the injector for the SwissFEL linac. An amount of typically 100 magnets of 4 different types (solenoids, quadrupoles, dipoles and correctors) is required in order to preserve the high brightness and the low emittance of the femto-second electron pulses. All the magnets are designed and magnetically measured at PSI in order to ensure that the required tolerances are fulfilled. The field gradient, the multipole contents and the magnetic center position are measured with two independent systems, an automated scanner and a uniaxial Hall Probe. We review the magnet design required for the injection phase and discuss the first results of the magnetic measurements.Index Terms-Dipole, field quality, quadrupole, synchrotron source.

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Magnet Design and Testing for the 250 MeV Injector of the SwissFEL at the Paul Scherrer Institute

Cited by 3 publications

References 4 publications

Commissioning experience and beam physics measurements at the SwissFEL Injector Test Facility

Commissioning experience and beam physics measurements at the SwissFEL Injector Test Facility

Magnetic Measurements and Commissioning of the Fast Ramped 90$^{\circ}$ Bending Magnet in the PROSCAN Gantry 2 Project at PSI

Magnet Design and Testing for the 250 MeV Injector of the SwissFEL at the Paul Scherrer Institute

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