The stochastic-cooling system for COSY-Julich

Brittner, P.; Danzglock, R.; Hacker, H.U.; Maier, R.; Pfister, U.; Prasuhn, D.; Singer, H. J.; Spieß, W.; Stockhorst, H.

doi:10.1109/pac.1991.164656

Cited by 2 publications

(5 citation statements)

References 4 publications

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“…5 The measured data (black symbols) in figure 4 show the expected behavior that the beam distributions are shifted hnearly towards lower energies due to the beam target interaction. The frequency slip factor was measured and resulted in ri = -0.1, i.e.…”

Section: Experimental Results and Model Predictionsmentioning

confidence: 72%

“…(4) that for an additional delay set equal to zero, zlJ^ = 0 , the cos-terms at each harmonic are nearly one if the upper frequency of the cooling system is restricted to J m fo 2-\2rr],^+r]A-\S\ (5) Note that both frequency slip factors determine this limit due to the fact that two kicks form the correction in notch filter cooling. Assuming 0~nl2 one concludes from eq.…”

Section: ^Nst)=-^0ist)mentioning

confidence: 99%

“…In longitudinal cooling the time evolution of the beam distribution ( , ) t Ψ δ is found from (numerically) solving a Fokker-Planck equation (FPE) [5] ( , ) ( , )…”

Section: The Longitudinal Stochastic Cooling Modelmentioning

confidence: 99%

“…Recently, a series of experimental stochastic cooling studies with the internal ANKE [18] cluster target [4] located in the dispersion free target straight section of COSY to test the model predictions for longitudinal cooling were performed. The routinely operating longitudinal stochastic cooling system applies the optical notch filter method in the frequency band I from 1-1.8 GHz [5].…”

Section: Introductionmentioning

confidence: 99%

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

Stockhorst

Stassen²,

Maier³

et al. 2007

AIP Conference Proceedings

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The High-Energy Storage Ring (HESR) of the future International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt is planned as an anti-proton cooler ring in the momentum range from 1.5 to 15 GeV/c. An important and challenging feature of the new facility is the combination of highly dense phase space cooled beams with internal targets. A detailed numerical and analytical approach to the Fokker-Planck equation for longitudinal filter cooling including the beam -target interaction has been carried out to demonstrate the stochastic cooling capability. To gain confidence in the model predictions a series of experimental stochastic cooling studies with the internal target ANKE at COSY have been carried out. A remarkable agreement between model and experiment was achieved. On this basis longitudinal stochastic cooling simulations were performed to predict the possibilities and limits of cooling when the newly installed WASA Pellet-target is operated.

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Section: Experimental Results and Model Predictionsmentioning

confidence: 72%

Section: ^Nst)=-^0ist)mentioning

confidence: 99%

“…In longitudinal cooling the time evolution of the beam distribution ( , ) t Ψ δ is found from (numerically) solving a Fokker-Planck equation (FPE) [5] ( , ) ( , )…”

Section: The Longitudinal Stochastic Cooling Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Stockhorst

Stassen²,

Maier³

et al. 2007

AIP Conference Proceedings

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“…However, the AD structure is mechanically complex, costly and difficult to maintain. The pickups and kickers of stochastic cooling for COSY in Jülich are very similar to AD/AC's structure [13]. Therefore, it is necessary to develop new pickup/kicker more suitable for the HIAF stochastic cooling system.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Cooling Pickup/Kicker Developments for the High-Precision Spectrometer Ring in the HIAF Project at IMP

Zhu

Caspers

et al. 2021

IEEE Trans. Nucl. Sci.

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Stochastic cooling of the Spectrometer Ring (SRing) at the High Intensity heavy-ion Accelerator Facility (HIAF) project in China, which is used mainly for experiments with radioactive fragment beams, is applied to speed up the cooling process of a stored ion beam. In this study, both a Faltin traveling wave structure and a novel slot-ring standing wave structure based on a ceramic vacuum chamber are discussed and evaluated for the pickup/kicker of the SRing stochastic cooling system. The slot-ring structure should significantly improve the shunt impedance due to the Cherenkov effect. For the Faltin-type structure, the results for the pickup shunt impedance obtained from simulations and from beam measurements agree well. Good agreement is also found between the simulated and measured results for the pickup shunt impedance of the slot-ring structure. Cooling process simulations using the Fokker-Planck equation based on the shunt impedance results for the Faltin and slot-ring type pickups are also presented.

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The stochastic-cooling system for COSY-Julich

Cited by 2 publications

References 4 publications

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

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

Stochastic Cooling Pickup/Kicker Developments for the High-Precision Spectrometer Ring in the HIAF Project at IMP

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