INJECTOR DESIGN USING COMBINED FUNCTION, MULTIPLE CAVITIES FOR SIX DIMENSIONAL PHASE SPACE PRESERVATION OF PARTICLE BUNCHES

• US 20150257247A1
• Filed: 03/04/2015
• Published: 09/10/2015
• Est. Priority Date: 03/09/2014
• Status: Active Grant

• Current Assignee: Jefferson Science Associates, Llc (Government of the United States of America)
• Original Assignee: Jefferson Science Associates, Llc (Government of the United States of America)
• Inventors: Hannon, Fay
• Granted Patent: US 9,408,289 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H05H 2007/004 for modifying beam energy, e.g. spread out Bragg peak devices
• CPC Class Codes: H05H 2007/025 Radiofrequency systems
• CPC Class Codes: H05H 7/001 Arrangements for beam delivery or irradiation irradiation systems per se G21K5/00
• CPC Class Codes: H05H 7/02 Circuits or systems for supplying or feeding radio-frequency energy radio-frequency generators H03B

Abstract

An injector design using a plurality of combined function cavities for six-dimensional phase space preservation of particle bunches. The combined function cavities are shaped optimally to account for phase-slippage, and operated at a phase such that a combination of acceleration and bunching occurs simultaneously, in proportion to one another, so that the 6D phase space doesn'"'"'t expand.

Claims

1. A method for preserving the six-dimensional (6D) brightness of highly space-charge dominated charged particle beams, comprising:

a. providing a plurality of initial radio frequency (RF) cavities to accelerate the particle beam to relativistic speed; and

b. operating the initial accelerator cavities to simultaneously accelerate and bunch the charged particles to maintain beam brightness;

2. The method of claim 1, which includes operating the initial RF cavities at a phase to enable bunching and accelerating to occur simultaneously, in proportion to one another, in order to prevent the 6D phase space from expanding.