Abstract
A thermocouple-based proton beam profile monitor is designed for use in front of the Los Alamos Neutron Scattering Center target. The purpose of the device is to determine the location and standard deviation of the incident proton beam using thermocouple temperatures. The beam profile monitor consists of two perpendicular planes of thermocouple wires mounted in 1 cm increments on Macor ceramic rings. Temperatures are measured from heat generated volumetrically in the thermocouple wires by the incident proton beam. Operating requirements for the device include the ability to work in pressure ranges of 0.1 to 10 Torr and at beam currents of 5 μA to 100 μA. Temperature data from a beam test are compared with predictions from an analytical model, a finite elements analysis using the code TOPAZ2D, and an automated curve fitting routine. Average relative errors of less than 10% are calculated from the analytical solution and the finite elements analysis. The curve fitting routine provides quick estimates of the proton beam parameters which are useful during beam tuning.
| Original language | English |
|---|---|
| Pages (from-to) | 300-306 |
| Number of pages | 7 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 344 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 1 1994 |
| Externally published | Yes |
Funding
The authors wish to thank the Medium Energy Physics (MP) Division at Los Alamos National Laboratory for financial support during the development of the analysis of this experiment . The talent shown by the Mechanical Engineering and Materials Section in Group MP-5 during the design and fabrication of the hardware is acknowledged . Thanks are also due to Richard Hutson for helpful discussions on the physics of convective heat transfer at reduced pressure .
| Funders | Funder number |
|---|---|
| Medium Energy Physics | |
| Los Alamos National Laboratory |