scholarly journals Emittance growth of accumulating proton beam in Booster due to multiple passes through the H-minus stripping foil

2018 ◽  
Author(s):  
Christopher J. Gardner
Keyword(s):  
Proton Beam ◽  
Emittance Growth ◽  
Stripping Foil

Lattice Design of Dedicated Synchrotron for Proton Therapy

2008 ◽  
Author(s):  
M. Hosseinzadeh ◽  
M. Ghergherechi ◽  
S. A. H. Feghhi ◽  
A. Mohammadzadeh ◽  
H. Afarideh
Keyword(s):  
Proton Beam ◽  
Proton Therapy ◽  
Accelerator Facility ◽  
Rf Cavity ◽  
Lattice Design ◽  
Longitudinal Plane ◽  
Lattice Arrangement ◽  
Emittance Growth ◽  
Proton Beam Energy ◽  
C 30

A compact model of synchrotron accelerator facility is proposed for the treatment of deep seated tumors with proton therapy. The extracted beam from the existing C-30 cyclotron is first injected into the model of synchrotron. The injected beam is specified with its longitudinal plane as well as its horizontal and vertical emittances. For this design to be compatible with the cyclotron C-30 the synchrotron should be kept compact and the number of magnet components must be low. The modeled synchrotron layout is designed using the computer codes MADX and AGILE in order to accelerate the injection proton ions from 30 MeV to a maximum extraction energy of 250 MeV with magnetic rigidity of 2.433 Tm. In this lattice arrangement with phase advance of about 90 degrees in two horizontal and vertical planes doublet cells are utilized. This ring consists of two long straight sections for RF and injection/extraction equipment, as well as four short straight sections. For chromaticity correction two families of sextupoles are used. To prohibit emittance growth, a matching at injection in longitudinal plane was performed. The proton beam energy spread of 2% can be improved to 0.1% at injection by using the designed achromatic system. For the proton beam acceleration a RF cavity with an approximate voltage of 160 volts with a frequency in the range of 2.3 up to 14 MHz is used.

scholarly journals Proton beam emittance growth in multipicosecond laser-solid interactions

2019 ◽  
Vol 21 (10) ◽  
pp. 103021
Author(s):  
Paul T Campbell ◽  
D Canning ◽  
A E Hussein ◽  
K D W Ratnayaka ◽  
A G R Thomas ◽  
...  
Keyword(s):  
Proton Beam ◽  
Beam Emittance ◽  
Emittance Growth ◽  
Laser Solid Interactions

scholarly journals Multiple Tune Jumps to Overcome Horizontal Depolarizing Resonances

2016 ◽  
Vol 40 ◽  
pp. 1660097
Author(s):  
H. Huang ◽  
L. A. Ahrens ◽  
M. Bai ◽  
K. A. Brown ◽  
Y. Dutheil ◽  
...  
Keyword(s):  
Proton Beam ◽  
Beam Optics ◽  
Emittance Growth ◽  
Polarized Proton

Imperfection and vertical intrinsic depolarizing resonances have been overcome by the two partial Siberian snakes in the Alternative Gradient Synchrotron(AGS). The relatively weak but numerous horizontal resonances are the main source of polarization loss in the AGS. A pair of horizontal tune jump quads have been used to overcome these weak resonances. The locations of the two quads have to be chosen such that the disturbance to the beam optics is minimum. The emittance growth has to be mitigated for this method to work. In addition, this technique needs very accurate jump timing. Using two partial Siberian snakes, with vertical tune inside the spin tune gap and 80% polarization at AGS injection, polarized proton beam had reached [Formula: see text] proton per bunch with 65% polarization. With the tune jump timing optimized and emittance preserved, more than 70% polarization with 2[Formula: see text] protons per bunch has been achieved.

scholarly journals Emittance Growth Due to Scattering by the Stripping Foil

1985 ◽  
Author(s):  
Ahrens L. ◽  
D. Barton ◽  
C. Gardner ◽  
E. Gill ◽  
J.P. Potier
Keyword(s):  
Emittance Growth ◽  
Stripping Foil
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