Gated beam imager for heavy ion beams

Ahle, L.; Hopkins, H. S.

doi:10.1063/1.57036

Cited by 8 publications

(8 citation statements)

References 3 publications

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“…Due to this shift, the net-baryon peak gradually moves from mid-rapidity (AGS and SPS) [5,6] towards high rapidity (RHIC) [7], leaving a relatively net-baryon poor region at mid-rapidity at the highest RHIC energy. At AGS energies, the observed ratio of strange particles to pions in A+A collisions is larger than that measured in either p+p or p+A collisions and this ratio increases significantly with beam energy [2,8,9]. This behavior is understood within cascade models as arising from hadronic rescatterings involving heavy baryon resonances [10,11].…”

Section: Introductionmentioning

confidence: 98%

Kaon and pion production in central Au + Au collisions at sNN=62.4 GeV

et al. 2010

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Invariant p T spectra and rapidity densities covering a large rapidity range (−0.1 < y < 3.5) are presented for π ± and K ± mesons from central Au+Au collisions at √ s NN = 62.4 GeV. The mid-rapidity yields of meson particles relative to their anti-particles are found to be close to unity (π85) while the anti-proton to proton ratio isp/p ∼ 0.49. The rapidity dependence of the π − /π + ratio is consistent with a small increase towards forward rapidities while the K − /K + andp/p ratios show a steep decrease to ∼ 0.3 for kaons and 0.022 for protons at y ∼ 3. It is observed that the kaon production relative to its own anti-particle as well as to pion production in wide rapidity and energy ranges shows an apparent universal behavior consistent with the baryo-chemical potential, as deduced from thep/p ratio, being the driving parameter.

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Section: Introductionmentioning

confidence: 98%

Kaon and pion production in central Au + Au collisions at sNN=62.4 GeV

et al. 2010

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“…We have developed an optical diagnostic technique for NTX as a faster and more flexible alternative to the double-slit technique. This optical technique, which is related to the gated beam imager (GBI) [33], uses scintillator plates imaged by an image-intensified chargecoupled-device (CCD) camera. The GBI uses a ''pepper pot'' to create an array of beamlets that are imaged directly onto a gated microchannel plate (MCP).…”

Section: Optical Diagnosticsmentioning

confidence: 99%

Design and characterization of a neutralized-transport experiment for heavy-ion fusion

Henestroza

Eylon

Roy

et al. 2004

Phys. Rev. ST Accel. Beams

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In heavy-ion inertial-confinement fusion systems, intense beams of ions must be transported from the exit of the final-focus magnet system through the fusion chamber to hit spots on the target with radii of about 2 mm. For the heavy-ion-fusion power-plant scenarios presently favored in the U.S., a substantial fraction of the ion-beam space charge must be neutralized during this final transport. The most effective neutralization technique found in numerical simulations is to pass each beam through a low-density plasma after the final focusing. To provide quantitative comparisons of these theoretical predictions with experiment, the Virtual National Laboratory for Heavy Ion Fusion has completed the construction and has begun experimentation with the neutralized-transport experiment. The experiment consists of three main sections, each with its own physics issues. The injector is designed to generate a very high-brightness, space-charge-dominated potassium beam, while still allowing variable perveance by a beam aperturing technique. The magnetic-focusing section, consisting of four pulsed quadrupoles, permits the study of magnet tuning, as well as the effects of phase-space dilution due to higher-order nonlinear fields. In the final section, the converging ion beam exiting the magnetic section is transported through a drift region with plasma sources for beam neutralization, and the final spot size is measured under various conditions of neutralization. In this paper, we discuss the design and characterization of the three sections in detail and present initial results from the experiment.

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“…Left: AGS Au+Au at 11.6 AGeV/c (full symbols)[12] and BRAHMS Au+Au at 200 GeV[13] (red full symbols are for 0-10% centrality, blue open symbols for 40-60% centrality). Right: Charged pion ratio produced in 0-10% Au+Au collisions at 200 GeV[13] as a function of transverse momentum.…”

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confidence: 99%

New information on the dynamics of relativistic nucleus-nucleus collisions

Jipa¹,

Beşliu²,

Ristea³

et al. 2012

J. Phys.: Conf. Ser.

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Relativistic heavy-ion collisions offer a unique opportunity to study highly excited dense nuclear matter in the laboratory. We present measurements of identified charged hadron production at different rapidities from Au+Au and p+p collisions at 200 GeV. Coulomb effects on pion spectra in relativistic nuclear collisions at RHIC energies will be investigated. The nuclear modification factors for identified particles show distinct meson/baryon dependence. At high p T the charged pion yields are suppressed by a factor of ~5, while the baryon production is enhanced in Au+Au collisions, when compared to the binary scaled p+p data from the same energy.

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Gated beam imager for heavy ion beams

Cited by 8 publications

References 3 publications

Kaon and pion production in central Au + Au collisions at sNN=62.4 GeV

Kaon and pion production in central Au + Au collisions at sNN=62.4 GeV

Design and characterization of a neutralized-transport experiment for heavy-ion fusion

New information on the dynamics of relativistic nucleus-nucleus collisions

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