The Transverse Energy Spread Spectrometer (TESS) was designed primarily to study the mean transverse energy spread of electrons emitted from photocathode electron sources at both room and liquid nitrogen temperatures as a function of quantum efficiency through analysis of the photoemission footprint. By reconfiguring the potentials applied to different detector elements, TESS can also be used to measure the mean longitudinal energy spread of photoemitted electrons. Initial plans were to use electrostatic wire meshes as a retarding element which prevents the detection of electrons with insufficient energy to overcome a variable potential barrier. However, this method has proved impractical and a new method has been proposed in which the photocathode bias potential is swept (effectively from a state of no electron emission to full emission) and the emitted photocurrent is then detected by using a photoemitted charge collector. In this article, we present the TESS set-up and analyze this new method to measure the longitudinal energy distribution curve. Experimental results are presented and compared to simulated results by utilising a custom designed tracking code.
Skip Nav Destination
Article navigation
August 2018
Research Article|
August 22 2018
Measurement of the longitudinal energy distribution of electrons in low energy beams using electrostatic elements
L. J. Devlin;
L. J. Devlin
1
The Cockcroft Institute, Sci-Tech Daresbury
, Warrington, United Kingdom
2
The University of Liverpool
, Liverpool, United Kingdom
Search for other works by this author on:
L. B. Jones
;
L. B. Jones
1
The Cockcroft Institute, Sci-Tech Daresbury
, Warrington, United Kingdom
3
ASTeC, STFC, Sci-Tech Daresbury
, Warrington, United Kingdom
Search for other works by this author on:
T. C. Q. Noakes
;
T. C. Q. Noakes
1
The Cockcroft Institute, Sci-Tech Daresbury
, Warrington, United Kingdom
3
ASTeC, STFC, Sci-Tech Daresbury
, Warrington, United Kingdom
Search for other works by this author on:
C. P. Welsch;
C. P. Welsch
1
The Cockcroft Institute, Sci-Tech Daresbury
, Warrington, United Kingdom
2
The University of Liverpool
, Liverpool, United Kingdom
Search for other works by this author on:
B. L. Militsyn
B. L. Militsyn
1
The Cockcroft Institute, Sci-Tech Daresbury
, Warrington, United Kingdom
3
ASTeC, STFC, Sci-Tech Daresbury
, Warrington, United Kingdom
Search for other works by this author on:
Rev. Sci. Instrum. 89, 083305 (2018)
Article history
Received:
April 19 2018
Accepted:
August 07 2018
Citation
L. J. Devlin, L. B. Jones, T. C. Q. Noakes, C. P. Welsch, B. L. Militsyn; Measurement of the longitudinal energy distribution of electrons in low energy beams using electrostatic elements. Rev. Sci. Instrum. 1 August 2018; 89 (8): 083305. https://doi.org/10.1063/1.5036925
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
Citing articles via
Related Content
The measurement of photocathode transverse energy distribution curves (TEDCs) using the transverse energy spread spectrometer (TESS) experimental system
Rev. Sci. Instrum. (November 2022)
Evolution of the transverse and longitudinal energy distributions of electrons emitted from a GaAsP photocathode as a function of its degradation state
J. Appl. Phys. (June 2017)
Complex impedance of TESs under AC bias using FDM readout system
AIP Advances (April 2019)
Ultra‐sensitive transition‐edge sensors (TESs) for far‐IR/submm space‐borne spectroscopy
AIP Conference Proceedings (December 2009)
A Numerical Simulation Of The Pulse Sequence Reconstruction in AC Biased TESs With a β Source
AIP Conference Proceedings (December 2009)