Gabor lens focusing of a proton beam

Conference · Mon Jan 01 04:00:00 EST 1990 · Review of Scientific Instruments; (USA)

OSTI ID:7168755

Palkovic, J A; Mills, F E; Schmidt, C; Young, D E ^[1]

---

1. Fermi National Accelerator Laboratory, Box 500, MS 307, Batavia, Illinois 60510 (US)

Gabor or plasma lenses have previously been used to focus intense beams of positive ions at energies from 10 keV to 5 MeV. Such lenses are a possible candidate for matching an intense low-energy proton beam into a radio frequency quadrupole accelerator (RFQ). The conventional solution has been to match an intense beam with two solenoid lenses. This leads to a time-dependent emittance at the RFQ entrance due to neutralization effects. The neutralization time of a space-charge dominated 30--50 mA proton beam in the Gabor lens is {lt}1 {mu}s. A non-neutral electron plasma is contained in the Gabor lens by a 200 G solenoid magnet. The equivalent thin lens focal length of a Gabor lens operated at Fermilab has been determined to be 10 cm. This focusing strength is adequate for matching a proton beam into an RFQ.

• OSTI ID: 7168755
• Report Number(s): CONF-890703--
• Conference Information: Journal Name: Review of Scientific Instruments; (USA) Journal Volume: 61:1
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAM EMITTANCE
BEAM OPTICS
BEAMS
DESIGN
ENERGY RANGE
FOCUSING
KEV RANGE
LENSES
MATHEMATICAL SPACE
MEASURING METHODS
MEV RANGE
NUCLEON BEAMS
PARTICLE BEAMS
PHASE SPACE
PROTON BEAMS
RF SYSTEMS
SPACE
SPACE CHARGE