A three-dimensional graphics systems for the stereotactic placement of heavy-ion beams

MRI-based gel dosimeters are attractive systems for the evaluation of complex dose distributions in radiotherapy. In particular, the nanocomposite Fricke gel dosimeter is one among a few dosimeters capable of accurately evaluating the dose distribution of heavy ion beams. In contrast, reduction of the scanning time is a challenging issue for the acquisition of three-dimensional volume data. In this study, we investigated a three-dimensional dose distribution measurement method for heavy ion beams using variable flip angle (VFA), which is expected to significantly reduce the MRI scanning time. Our findings clarified that the whole three-dimensional dose distribution could be evaluated within the conventional imaging time (20 min) and quality of one cross-section.

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Three-dimensional thermal simulations of thin solid carbon foils for charge stripping of high current uranium ion beams at a proposed new heavy-ion linac at GSI

Physical Review Special Topics - Accelerators and Beams ◽

10.1103/physrevstab.17.041003 ◽

2014 ◽

Vol 17 (4) ◽

Cited By ~ 5

Author(s):

N. A. Tahir ◽

V. Kim ◽

B. Schlitt ◽

W. Barth ◽

L. Groening ◽

...

Keyword(s):

Three Dimensional ◽

Heavy Ion ◽

Ion Beams ◽

Solid Carbon ◽

High Current ◽

Uranium Ion ◽

Carbon Foils ◽

Thermal Simulations ◽

Heavy Ion Linac

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Three dimensional simulations of space charge dominated heavy ion beams with applications to inertial fusion energy

10.2172/110795 ◽

1994 ◽

Cited By ~ 6

Author(s):

David Peter Grote

Keyword(s):

Space Charge ◽

Fusion Energy ◽

Three Dimensional ◽

Heavy Ion ◽

Ion Beams ◽

Inertial Fusion ◽

Inertial Fusion Energy ◽

Three Dimensional Simulations

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6.2.3 Interaction between Heavy Ion Beams at Several Hundreds MeV/u and Crystal Targets —Three-dimensional Resonant Coherent Excitation—

RADIOISOTOPES ◽

10.3769/radioisotopes.68.517 ◽

2019 ◽

Vol 68 (8) ◽

pp. 517-528

Author(s):

Yuji Nakano ◽

Toshiyuki Azuma

Keyword(s):

Three Dimensional ◽

Heavy Ion ◽

Ion Beams ◽

Coherent Excitation

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Axial Observation of X-Ray Spectra from a Beam-Foil Source

International Astronomical Union Colloquium ◽

10.1017/s0252921100108048 ◽

1988 ◽

Vol 102 ◽

pp. 339-342

Author(s):

J.M. Laming ◽

J.D. Silver ◽

R. Barnsley ◽

J. Dunn ◽

K.D. Evans ◽

...

Keyword(s):

Spectral Resolution ◽

Heavy Ion ◽

Ion Beams ◽

Beam Axis ◽

Doppler Broadening ◽

X Ray ◽

Beam Foil

AbstractNew observations of x-ray spectra from foil-excited heavy ion beams are reported. By observing the target in a direction along the beam axis, an improvement in spectral resolution, δλ/λ, by about a factor of two is achieved, due to the reduced Doppler broadening in this geometry.

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POSSIBILITY OF FORMING A LARGE DCC IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS

International Journal of Modern Physics A ◽

10.1142/s0217751x0000094x ◽

2000 ◽

Vol 15 (15) ◽

pp. 2269-2288

Author(s):

SANATAN DIGAL ◽

RAJARSHI RAY ◽

SUPRATIM SENGUPTA ◽

AJIT M. SRIVASTAVA

Keyword(s):

Three Dimensional ◽

Thermal Fluctuations ◽

Heavy Ion ◽

High Energy ◽

Chiral Condensate ◽

Relativistic Heavy Ion Collisions ◽

Maximum Temperature ◽

Chiral Field ◽

Heavy Nuclei ◽

True Vacuum

We demonstrate the possibility of forming a single, large domain of disoriented chiral condensate (DCC) in a heavy-ion collision. In our scenario, rapid initial heating of the parton system provides a driving force for the chiral field, moving it away from the true vacuum and forcing it to go to the opposite point on the vacuum manifold. This converts the entire hot region into a single DCC domain. Subsequent rolling down of the chiral field to its true vacuum will then lead to emission of a large number of (approximately) coherent pions. The requirement of suppression of thermal fluctuations to maintain the (approximate) coherence of such a large DCC domain, favors three-dimensional expansion of the plasma over the longitudinal expansion even at very early stages of evolution. This also constrains the maximum temperature of the system to lie within a window. We roughly estimate this window to be about 200–400 MeV. These results lead us to predict that extremely high energy collisions of very small nuclei (possibly hadrons) are better suited for observing signatures of a large DCC. Another possibility is to focus on peripheral collisions of heavy nuclei.

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