Modification of LAMPF's magnet-mapping code for offsets of center coordinates

Conference · Tue Jan 01 00:00:00 EST 1991

DOI:https://doi.org/10.1109/PAC.1991.164891· OSTI ID:5725502

Hurd, J W; Gomulka, S; Merrill, F; Weintraub, B L

One of the magnet measurements performed at LAMPF is the determination of the cylindrical harmonics of a quadrupole magnet using a rotating coil. The data are analyzed with the code HARMAL to derive the amplitudes of the harmonics. Initially, the origin of the polar coordinate system is the axis of the rotating coil. A new coordinate system is found by a simple translation of the old system such that the dipole moment in the new system is zero. The origin of this translated system is referred to as the magnetic center. Given this translation, the code calculates the coefficients of the cylindrical harmonics in the new system. The code has been modified to use an analytical calculation to determine these new coefficients. The method of calculation is described and some implications of this formulation are presented. 8 refs., 2 figs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5725502
• Report Number(s): LA-UR-91-1415; CONF-910505-10; ON: DE91011411
• Resource Relation: Conference: 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
MAGNETIC FIELD CONFIGURATIONS
H CODES
MAPPING
ANALYTICAL SOLUTION
FIELD EQUATIONS
HARMONICS
LAMPF LINAC
LAPLACE EQUATION
MAGNETS
MODIFICATIONS
QUADRUPOLES
ACCELERATORS
COMPUTER CODES
DIFFERENTIAL EQUATIONS
EQUATIONS
LINEAR ACCELERATORS
MESON FACTORIES
MULTIPOLES
OSCILLATIONS
PARTIAL DIFFERENTIAL EQUATIONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics