A Scanning Wire Beam Profile Monitor

Steinbach, C.; Rooij, M Van

doi:10.1109/tns.1985.4333767

Cited by 16 publications

(9 citation statements)

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“…6, where the horizontal beam size measured with a wire scanner [19] at PS top energy is plotted as a function of beam intensity. A linear relationship between the two quantities is clearly visible.…”

Section: B Ps Booster Beammentioning

confidence: 99%

First observations of intensity-dependent effects for transversely split beams during multiturn extraction studies at the CERN Proton Synchrotron

Gilardoni

Giovannozzi

Hernalsteens

2013

Phys. Rev. ST Accel. Beams

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During the commissioning of the CERN Proton Synchrotron multiturn extraction, tests with different beam intensities were performed in order to probe the behavior of resonance crossing in the presence of possible space charge effects. The initial beam intensity before transverse splitting was varied and the properties of the five beamlets obtained by crossing the fourth-order horizontal resonance were studied. A clear dependence of the beamlets' parameters on the total beam intensity was found, which is the first direct observation of intensity-dependent effects for such a peculiar beam type. The experimental results are presented and discussed in detail in this paper.

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Section: B Ps Booster Beammentioning

confidence: 99%

First observations of intensity-dependent effects for transversely split beams during multiturn extraction studies at the CERN Proton Synchrotron

Gilardoni

Giovannozzi

Hernalsteens

2013

Phys. Rev. ST Accel. Beams

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“…The phase space reconstruction is based on turn-by-turn acquisition of the beam trajectory on two pickups 90 • apart [7]. The beam profile is measured by means of a wire scanner [11]. Among the four installed, two for each transverse plane, the horizontal one in section 54 is routinely used for the measurements reported here.…”

Section: Machine and Instrumentationmentioning

confidence: 99%

Multiturn Extraction Based on Trapping in Stable Islands

Cappi¹,

Gilardoni²,

Giovannozzi³

et al. 2005

AIP Conference Proceedings

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For some applications an intermediate extraction mode between fast (one turn) and slow (several thousand turns) is needed. This is the case of the five-turn extraction used to transfer the proton beam from the CERN Proton Synchrotron (PS) to the Super Proton Synchrotron (SPS). Unavoidable losses and poor betatronic matching with the receiving machine affect the present approach, which is based on beam slicing by means of an electrostatic septum. These features are rather serious obstacles to an intensity upgrade of the PS/SPS Complex. To overcome these difficulties, a novel extraction technique was proposed recently. By using nonlinear magnetic elements, stable islands can be generated in the transverse phase space. Furthermore, provided the linear tune is varied slowly, it is possible to trap the charged particles inside the stable islands in order to split the beam into different beamlets. Once generated, the distance between these beamlets can be tailored to the extraction needs by simply increasing the distance of the tune from the resonance value. The results of numerical simulations for the novel technique are presented and discussed in detail together with the outcome of the intense experimental studies performed to assess the validity of this approach. Abstract. For some applications an intermediate extraction mode between fast (one turn) and slow (several thousand turns) is needed. This is the case of the five-turn extraction used to transfer the proton beam from the CERN Proton Synchrotron (PS) to the Super Proton Synchrotron (SPS). Unavoidable losses and poor betatronic matching with the receiving machine affect the present approach, which is based on beam slicing by means of an electrostatic septum. These features are rather serious obstacles to an intensity upgrade of the PS/SPS Complex. To overcome these difficulties, a novel extraction technique was proposed recently. By using nonlinear magnetic elements, stable islands can be generated in the transverse phase space. Furthermore, provided the linear tune is varied slowly, it is possible to trap the charged particles inside the stable islands in order to split the beam into different beamlets. Once generated, the distance between these beamlets can be tailored to the extraction needs by simply increasing the distance of the tune from the resonance value. The results of numerical simulations for the novel technique are presented and discussed in detail together with the outcome of the intense experimental studies performed to assess the validity of this approach.

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“…A new acquisition system, based on a fast digitiser, was developed [9,10]. The beam profile measurement was obtained with a flying wire scanner device [11] currently available in the PS ring. A schematic layout of the PS ring including the newly installed elements as well as other key devices for the adiabatic beam capture tests described in this paper is shown in Fig.…”

Section: Machine and Instrumentation Modificationsmentioning

confidence: 99%

Adiabatic beam trapping in stable islands of transverse phase space: measurement results at CERN Proton Synchrotron

Cappi

Giovannozzi

Martini

et al.

Proceedings of the 2003 Bipolar/BiCMOS Circuits and Technology Meeting (IEEE Cat. No.03CH37440)

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Recently a novel approach to the problem of multi-turn extraction was proposed. It consists of splitting the beam by adiabatic capture inside stable islands created in the transverse phase space by sextupoles and octupoles. Numerical simulations indicate that such a technique should be feasible and potentially superior to the method presently used at the CERN Proton Synchrotron. During 2002, intense efforts were devoted to the experimental verification of this newly proposed extraction mode. Finally, beam capture into the islands was observed. In this paper, the extraction principle is briefly reviewed and the experimental results are presented and discussed in detail. EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN -AB Division AbstractRecently a novel approach to the problem of multi-turn extraction was proposed. It consists of splitting the beam by adiabatic capture inside stable islands created in the transverse phase space by sextupoles and octupoles. Numerical simulations indicate that such a technique should be feasible and potentially superior to the method presently used at the CERN Proton Synchrotron. During 2002, intense efforts were devoted to the experimental verification of this newly proposed extraction mode. Finally, beam capture into the islands was observed. In this paper, the extraction principle is briefly reviewed and the experimental results are presented and discussed in detail.

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A Scanning Wire Beam Profile Monitor

Cited by 16 publications

References 0 publications

First observations of intensity-dependent effects for transversely split beams during multiturn extraction studies at the CERN Proton Synchrotron

First observations of intensity-dependent effects for transversely split beams during multiturn extraction studies at the CERN Proton Synchrotron

Multiturn Extraction Based on Trapping in Stable Islands

Adiabatic beam trapping in stable islands of transverse phase space: measurement results at CERN Proton Synchrotron

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