OBSERVATION OF REPETITION-RATE DEPENDANT EMISSION FROM AN UN-GATED THERMIONIC CATHODE RF GUN

Conference · Wed Sep 28 00:00:00 EDT 2016

OSTI ID:1329667

Edelen, J. P. ^[1]; Sun, Y. ^[2]; Harris, J. R. ^[3]; Lewellen, J. W. ^[4]

---

1. Fermilab
2. Argonne
3. AFRL, NM
4. Los Alamos Natl. Lab.

Recent work at Fermilab in collaboration with the Advanced Photon Source and members of other national labs, designed an experiment to study the relationship between the RF repetition rate and the average current per RF pulse. While existing models anticipate a direct relationship between these two parameters we observed an inverse relationship. We believe this is a result of damage to the barium coating on the cathode surface caused by a change in back-bombardment power that is unaccounted for in the existing theories. These observations shed new light on the challenges and fundamental limitations associated with scaling an ungated thermionic cathode RF gun to high average current machines.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1329667
• Report Number(s): FERMILAB-CONF-16-414-AD; 1492688
• Resource Relation: Conference: 2nd North American Particle Accelerator Conference, Chicago, Illinois, USA, 10/09-10/14/2016
• Country of Publication: United States
• Language: English