title: Observation of Field-Emission Dependence on Stored Energy.
abstract: Field emission from a solid metal surface has been continuously studied for a century over macroscopic to atomic scales. It is general knowledge that, other than the surface properties, the emitted current is governed solely by the applied electric field. A pin cathode has been used to study the dependence of field emission on stored energy in an L-band rf gun. The stored energy was changed by adjusting the axial position (distance between the cathode base and the gun back surface) of the cathode while the applied electric field on the cathode tip is kept constant. A very strong correlation of the field-emission current with the stored energy has been observed. While eliminating all possible interfering sources, an enhancement of the current by a factor of 5 was obtained as the stored energy was increased by a factor of 3. It implies that under certain circumstances a localized field emission may be significantly altered by the global parameters in a system.
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China.|Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Jiahang
authors.initials: J
authors.lastname: Shao
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: Sergey P
authors.initials: SP
authors.lastname: Antipov
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Baryshev
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Huaibi
authors.initials: H
authors.lastname: Chen
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Manoel
authors.initials: M
authors.lastname: Conde
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Darrell S
authors.initials: DS
authors.lastname: Doran
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Gai
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: Chunguang
authors.initials: C
authors.lastname: Jing
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Wanming
authors.initials: W
authors.lastname: Liu
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: John
authors.initials: J
authors.lastname: Power
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Qiu
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Jiaru
authors.initials: J
authors.lastname: Shi
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China.|Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: Faya
authors.initials: F
authors.lastname: Wang
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Charles E
authors.initials: CE
authors.lastname: Whiteford
authors.affiliation: Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Wisniewski
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: Liling
authors.initials: L
authors.lastname: Xiao