Planar pick-up electrodes for stochastic cooling

Peschke, C.; Nolden, F.; Balk, Monika C.

doi:10.1016/j.nima.2004.06.082

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…The RIBs deliver much stronger signals, making a slight performance degradation due to the fixed delay acceptable. As dicussed in [1], the amplitude degradation is only 4.6 % at 1.5 GHz with an electrode distance of 25 mm and eight electrodes per group. Fig.…”

Section: Signal Combination and Noise Temperaturementioning

confidence: 91%

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Pick-Up and Kicker Electrodes for the CR

Peschke¹,

Nolden²,

Thorndahl³

2006

AIP Conference Proceedings

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The collector ring (CR) of the proposed GSI project FAIR includes a fast stochastic cooling system for exotic nuclei and antiprotons. To reach a good signal to noise ratio of the pickup even with a low number of particles, a novel pickup and kicker electrode system based on slotlines is presented. The sensitivity and noise properties of electrode models are calculated. These are compared with other types of electrodes. Different options for signal processing and layout of a pickup or kicker with many electrodes for different beam velocities are discussed.

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Section: Signal Combination and Noise Temperaturementioning

confidence: 91%

“…Therefore the pickups must have a large bandwidth and a high S/N ratio in spite of their large aperture of 120 • 120 mm 2 . A new planar electrode is developed [1] to meet these requirements.…”

Section: Slotline Electrode Developmentmentioning

confidence: 99%

Pick-Up and Kicker Electrodes for the CR

Peschke¹,

Nolden²,

Thorndahl³

2006

AIP Conference Proceedings

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“…For the cooling of the low intensity ion beams and for the antiproton cooling high sensitivity of the pick-ups is indispensable. A new slot line structure for the band 1-2 GHz coupled to a micro-strip circuit has been developed [7]. Cooling of the pick-ups to 20 K with a cold head is included in the design of the vacuum tank.…”

Section: Stochastic Coolingmentioning

confidence: 99%

Status of the Storage Ring Design at FAIR

Litvinov¹

2012

Proceedings of 8th International Conference on Nuclear Physics at Storage Rings — PoS(STORI11)

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The large acceptance Collector Ring (CR) together with the High Energy Storage Ring (HESR) is the storage ring which will be realized in the Modularized Start Version (MSV) of the FAIR project. It will be operated in three ion-optical modes, two of them providing fast pre-cooling of either antiprotons or RIBs. The CR design was recently adapted to the use as a pre-cooling ring for subsequent beam accumulation in the HESR. The third mode, namely the isochronous mode, is a special ion-optical setting for mass measurement of exotic very short-lived nuclei. In this mode the CR will be operated as a Time-Of-Flight (TOF) spectrometer. The latest results of the general storage ring concept at FAIR will be presented and future perspectives of the ring complex development will be discussed.

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“…Stripline and slotted pickups [5,6] are frequently used as both kickers and pickups for such feedback system. The latter tends to be used for stochastic cooling [7]. Cesaratto et al [8] studied three types of transverse kickers (a stripline kicker, a cavity kicker, and a slotted kicker) for the Super Proton Synchrotron (SPS) at CERN.…”

Section: Introductionmentioning

confidence: 99%

Triangle and concave pentagon electrodes for an improved broadband frequency response of stripline beam position monitors

Shobuda

Chin

Takata

et al. 2016

Phys. Rev. Accel. Beams

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The frequency domain performance of a stripline beam position monitor depends largely on the longitudinal shape of its electrode. Some shapes other than a conventional rectangle have been proposed and tested. To attain a good impedance matching along the electrode, they need to be precisely bent down toward their downstream in proportion to their width. This is a considerable task, and a failure to comply with it will result in a large distortion of the frequency-domain transfer function from the ideal one due to unwanted signal reflections. In this report, we first propose a triangle electrode for easy fabrication and setup: it only requires that a triangularly cut flat electrode will be placed in a chamber while being obliquely inclined toward the downstream port. Theoretical and simulation results show that the simple triangle electrode has a remarkably flatter frequency response than the rectangle one. The frequency response, in particular at high frequencies, can be further improved by attaching an "apron" plate, perpendicular to the upstream edge of the electrode. The overshooting of the frequency response at low frequency can be eliminated by replacing the straight sidelines of the triangle by three-point polylines (with a result that the triangle is transformed to a concave pentagon). The concave pentagon electrode needs to be bent only once at the middle point of the polylines for a good impedance matching and thus its fabrication and setup remain to be easy. Rf measurements for the various electrode shapes have been carried out. We found that the concave pentagon electrode achieves a wide and flat frequency response up to about 4 GHz for the J-PARC Main Ring (MR).

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Planar pick-up electrodes for stochastic cooling

Cited by 6 publications

References 2 publications

Pick-Up and Kicker Electrodes for the CR

Pick-Up and Kicker Electrodes for the CR

Status of the Storage Ring Design at FAIR

Triangle and concave pentagon electrodes for an improved broadband frequency response of stripline beam position monitors

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