Experimental Test of Momentum Cooling Model Predictions at COSY and Conclusions for WASA and HESR

Stockhorst, H.; Stassen, R.; Maier, R.; Prasuhn, D.; Katayama, Tsuneo; Thorndahl, L.

doi:10.1063/1.2819042

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…At COSY Jülich, a BB system is used to compensate the energy loss caused by the internal experiments [1]. A constant event rate is desired for the experiments.…”

Section: Introductionmentioning

confidence: 99%

Improved waveforms for Barrier-Bucket systems

Breitkreutz,

Stassen

2024

J. Phys.: Conf. Ser.

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Barrier-Bucket (BB) systems provide a method to apply a short gap to a coasting beam. This is utilized for different applications, like ion cleaning, or to compensate the medium energy loss caused by internal experiments. BB-cavities are broadband cavities, and the applied signal is commonly a short sine burst, followed by a flat section at zero voltage. Since the transfer function of the BB-system is usually neither flat nor linear, it is common to predistort the signal to obtain the desired shape at the rf gap. Nevertheless, the resulting waveform still has a ripple in the flat section. This is due to the lowpass characteristic of the amplifier and the sharp edges at the ends of the sine, which lead to an infinite number of harmonics. This paper provides better suited BB-waveforms, which are designed with a finite number of harmonics from the beginning. It is shown that a much better flatness can be achieved than for a conventional BB-waveform, without sacrificing any performance. These advanced waveforms are currently used at the hadron synchrotron COSY at Forschungszentrum Jülich, leading to improved BB-bunch shapes, in particular for electron-cooled beams.

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“…At COSY Jülich, a BB system is used to compensate the energy loss caused by the internal experiments [1]. A constant event rate is desired for the experiments.…”

Section: Introductionmentioning

confidence: 99%

Improved waveforms for Barrier-Bucket systems

Breitkreutz,

Stassen

2024

J. Phys.: Conf. Ser.

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show abstract

“…The notch filter is replaced by a 90 • broadband phase shifter. Since there is no noise filtering function in the TOF system, small amplifier gain is inevitable to avoid the diffusion effect [5,6].…”

Section: Introductionmentioning

confidence: 99%

Particle tracking simulation in the CSRe stochastic cooling system

Yuan

et al. 2015

Chinese Phys. C

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Stochastic cooling, as the different cooling mechanism from electron cooling, is designed and constructed on CSRe (experimental Cooling Storage Ring) in HIRFL (Heavy Ion Research Facility in Lanzhou) at present. The beam extracted from CSRm (main Cooling Storage Ring) is injected into the CSRe, and then the secondary beam with large momentum spread and large emittance is produced at the internal target area. This paper is designed to optimize the lattice of CSRe in order to satisfy the requirement of stochastic cooling system. Particle Tracking Method is used and both transverse and longitudinal simulation is made on the basis of the designed lattice. The results indicate that stochastic cooling is suitable for beam cooling with larger momentum spread or larger emittance, and cooling rate is preliminarily confirmed.

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Beam- and Spin Dynamics for Hadron Storage Rings

Lehrach

2015

Microsc Microanal

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Experimental Test of Momentum Cooling Model Predictions at COSY and Conclusions for WASA and HESR

Cited by 4 publications

References 3 publications

Improved waveforms for Barrier-Bucket systems

Improved waveforms for Barrier-Bucket systems

Particle tracking simulation in the CSRe stochastic cooling system

Beam- and Spin Dynamics for Hadron Storage Rings

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