Funneling: an initial beam dynamics study
Funneling two H/sup -/ beams into a single beam of twice the current has been examined as a means of doubling beam current without significantly increasing transverse emittance. Using the PARMILA particle-following code, two 100-mA RFQ output beams at 2 MeV were injected into idealized transport lines for merging two beams into one. Two approaches were studied: (1) the minimum-element method, in which a minimum number of discrete elements such as quadrupole triplets, buncher cavities, and bending magnets were used to transport and deflect the beam; and (2) the quasi-adiabatic method, in which a periodic lattice similar to the RFQ provided focusing and minimized abrupt changes in the beam environment. The minimum-element method resulted in an emittance growth ratio epsilon/sub 0//epsilon/sub i/ = 2.5, whereas the quasi-adiabatic emittance growth ratio was about 1.1 (albeit with an idealized line configuration). 5 refs., 4 figs., 3 tabs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5488094
- Report Number(s):
- LA-UR-85-1625; CONF-8505164-1; ON: DE85012652
- Country of Publication:
- United States
- Language:
- English
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430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BEAM CURRENTS
BEAM EMITTANCE
BEAM STACKING
BEAM TRANSPORT
BEAMS
CURRENTS
DATA
ENERGY RANGE
HYDROGEN 1 MINUS BEAMS
INFORMATION
ION BEAMS
LINEAR ACCELERATORS
MEV RANGE
MEV RANGE 01-10
MILLI AMP BEAM CURRENTS
NUMERICAL DATA
QUADRUPOLE LINACS
THEORETICAL DATA