Development of a pepper pot emittance probe and its application for ECR ion beam studies

Kondrashev, S.; Barcikowski, A.; Mustapha, B.; Ostroumov, P. N.; Vinogradov, N.

doi:10.1016/j.nima.2009.04.050

Cited by 18 publications

(12 citation statements)

References 11 publications

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“…slit-slit, slit and collector, electric sweep, quadrupole scan, pepper pot etc. [4][5][6][7][8][9][10][11][12][13][14]. In our study we have used a slit-slit emittance measurement method.…”

Section: Methods Of Emittance Measurementmentioning

confidence: 99%

Emittance and proton fraction measurement in High current electron cyclotron resonance proton ion source

Roychowdhury

Kewlani

Mishra

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…slit-slit, slit and collector, electric sweep, quadrupole scan, pepper pot etc. [4][5][6][7][8][9][10][11][12][13][14]. In our study we have used a slit-slit emittance measurement method.…”

Section: Methods Of Emittance Measurementmentioning

confidence: 99%

Emittance and proton fraction measurement in High current electron cyclotron resonance proton ion source

Roychowdhury

Kewlani

Mishra

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…The phase space ellipses are shown in Figure 4. The red dots delimit the maximal area in the phase space [14], while the black dots enclosed in the red dots are the film data. These results will be used to estimate the beamline simulations.…”

Section: Resultsmentioning

confidence: 99%

Emittance Measurement for Beamline Extension at the PET Cyclotron

Park

Lee

Kim

2016

Science and Technology of Nuclear Installations

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Particle-induced X-ray emission is used for determining the elemental composition of materials. This method uses low-energy protons (of several MeV), which can be obtained from high-energy (of tens MeV) accelerators. Instead of manufacturing an accelerator for generating the MeV protons, the use of a PET cyclotron has been suggested for designing the beamline for multipurpose applications, especially for the PIXE experiment, which has a dedicated high-energy (of tens MeV) accelerator. The beam properties of the cyclotron were determined at this experimental facility by using an external beamline before transferring the ion beam to the experimental chamber. We measured the beam profile and calculated the emittance using the pepper-pot method. The beam profile was measured as the beam current using a wire scanner, and the emittance was measured as the beam distribution at the beam dump using a radiochromic film. We analyzed the measurement results and are planning to use the results obtained in the simulations of external beamline and aligned beamline components. We will consider energy degradation after computing the beamline simulation. The experimental study focused on measuring the emittance from the cyclotron, and the results of this study are presented in this paper.

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“…The ECR and 60 bending magnets were tuned to transport approximately 40 A of 16 O 5þ ions to the RFQ entrance. Figure 14 shows a typical emittance measurement taken by the pepper-pot emittance probe [21] upstream of the electrostatic triplet. The measured Twiss parameters were used to match the beam to the RFQ acceptance using the electrostatic triplet, which is directly attached to the entrance flange of the RFQ.…”

Section: B Beam Measurementsmentioning

confidence: 99%

Development and beam test of a continuous wave radio frequency quadrupole accelerator

Ostroumov

Mustapha

Barcikowski

et al. 2012

Phys. Rev. ST Accel. Beams

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The front end of any modern ion accelerator includes a radio frequency quadrupole (RFQ). While many pulsed ion linacs successfully operate RFQs, several ion accelerators worldwide have significant difficulties operating continuous wave (CW) RFQs to design specifications. In this paper we describe the development and results of the beam commissioning of a CW RFQ designed and built for the National User Facility: Argonne Tandem Linac Accelerator System (ATLAS). Several innovative ideas were implemented in this CW RFQ. By selecting a multisegment split-coaxial structure, we reached moderate transverse dimensions for a 60.625-MHz resonator and provided a highly stabilized electromagnetic field distribution. The accelerating section of the RFQ occupies approximately 50% of the total length and is based on a trapezoidal vane tip modulation that increased the resonator shunt impedance by 60% in this section as compared to conventional sinusoidal modulation. To form an axially symmetric beam exiting the RFQ, a very short output radial matcher with a length of 0:75 was developed. The RFQ is designed as a 100% oxygen-free electronic (OFE) copper structure and fabricated with a two-step furnace brazing process. The radio frequency (rf) measurements show excellent rf properties for the resonator, with a measured intrinsic Q equal to 94% of the simulated value for OFE copper. An O 5þ ion beam extracted from an electron cyclotron resonance ion source was used for the RFQ commissioning. In off-line beam testing, we found excellent coincidence of the measured beam parameters with the results of beam dynamics simulations performed using the beam dynamics code TRACK, which was developed at Argonne. These results demonstrate the great success of the RFQ design and fabrication technology developed here, which can be applied to future CW RFQs.

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Development of a pepper pot emittance probe and its application for ECR ion beam studies

Cited by 18 publications

References 11 publications

Emittance and proton fraction measurement in High current electron cyclotron resonance proton ion source

Emittance and proton fraction measurement in High current electron cyclotron resonance proton ion source

Emittance Measurement for Beamline Extension at the PET Cyclotron

Development and beam test of a continuous wave radio frequency quadrupole accelerator

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