PAC2013 - List of Authors (Piot, P.)

Paper

Title

Page

The Advanced Superconducting Test Accelerator (ASTA) at Fermilab

67

P. Piot
Fermilab, Batavia, USA
P. Piot
Northern Illinois University, DeKalb, Illinois, USA

Funding: This work is supported by DOE contract DE-AC02-07CH11359 to the Fermi Research Alliance LLC
The Advanced Superconducting Test Accelerator (ASTA) currently in construction at Fermilab will enable a broad range of beam-based experiments to study fundamental limitations to beam intensity and to develop transformative approaches to particle-beam generation, acceleration and manipulation*. ASTA incorporates a superconducting radiofrequency (SRF) linac coupled to a photoinjector and small-circumference storage ring capable of storing electrons or protons. This report describes the facility, its capabilities, and provide an overview of enabled research thrusts.
* see http://apc.fnal.gov/programs2/ASTA_TEMP/index.shtml

Slides MOZBB1 [14.585 MB]

TUPAC21

Performance Comparisons of Emittance-exchanger Beamlines

496

C.R. Prokop, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
B.E. Carlsten
LANL, Los Alamos, New Mexico, USA
M.D. Church, P. Piot
Fermilab, Batavia, USA

Funding: Work supported by LDRD project #20110067DR and by the U.S. DoE Contract No. DE-FG02-08ER41532 with NIU and No. DE-AC02-07CH11359 with Fermilab.
Earlier experiments at Fermilab’s A0 Photoinjector Laboratory demonstrated successful transverse-to-longitudinal emittance exchange (EEX) using a transverse-deflecting cavity (TDC) located between two identical doglegs. Such a design has the disadvantage of transversely displacing the beam. An alternative is an EEX beamline designed out of a variable R₅₆ bunch compressor chicane. In this paper, we present designs and simulation comparisons for several emittance-exchanger beamlines, including the double-dogleg and chicane designs, as well as variations of the chicane design that allow for increasing its dispersion which proportionally decreases the field-strength requirements on the TDC. These comparisons are performed with PIC models of space charge and coherent synchrotron radiation.

TUPSM24

Operation of a Diamond Field-Emission-Array Cathode in an L-Band RF-Gun

685

P. Piot, B.R. Blomberg, D. Mihalcea, H. Panuganti
Northern Illinois University, DeKalb, Illinois, USA
C.A. Brau, B.K. Choi, B.L. Ivanov, J.D. Jarvis, M.H. Mendenhall
Vanderbilt University, Nashville, USA
W.E. Gabella
Vanderbilt University, W.M. Keck Foundation Free-Electron Laser Center, Nashville, USA
P. Piot
Fermilab, Batavia, USA

We report on the operation of a field-emission diamond cathode in a L-band RF-gun (1.3 GHz) at Fermilab's HBESL facility. The diamond cathode consists of an array of a million sub-micrometric pyramidal diamond tips. Beam currents in excess of 10 mA were observed and the cathode did not show appreciable signs of degradation after days of operation. Measured Fowler-Nordheim characteristics and transverse beam densities are also reported.

TUPSM25

Multiphoton Emission from Cesium Telluride Photocathodes

688

H. Panuganti, P. Piot, C.R. Prokop
Northern Illinois University, DeKalb, Illinois, USA
P. Piot
Fermilab, Batavia, USA

The High-Brightness Electron Source Lab (HBESL) operates an L-band RF gun (1.3-GHz) that incorporates a Cesium Telluride photocathode illuminated by ultra-short (sub-100-fs) laser pulses. In this contribution we report recent studies on (1) characterizing the longitudinal phase of the photoemitted bunch in the blow-out regime using a single-shot diagnostics, (2) exploring the electron beam emission using 800 nm laser pulses (instead of the 266 nm nominal wavelength).

MOPAC15

ASTA at Fermilab: Accelerator Physics and Accelerator Education Programs at the Modern Accelerator R&D Users Facility for HEP and Accelerator Applications

96

V.D. Shiltsev
Fermilab, Batavia, USA
P. Piot
Northern Illinois University, DeKalb, Illinois, USA

We present the current and planned accelerator physics program at accelerator education program at ASTA (Advanced Superconducting Test Accelerator). It will enable a broad range of beam-based experiments to study fundamental limitations to beam intensity and to develop transformative approaches to particle-beam generation, acceleration and manipulation. ASTA incorporates a superconducting radiofrequency (SRF) linac coupled to a photoinjector and small-circumference storage ring capable of storing electrons or protons. ASTA will establish a unique resource for R&D towards Energy Frontier facilities and a test-bed for SRF accelerators and high-brightness beam applications. The unique features of ASTA include: (1) a high repetition-rate, (2) one of the highest peak and average brightness within the U.S., (3)a GeV-scale beam energy, (4) an extremely stable beam, (5) the availability of SRF and high-quality beams together, and (6) a storage ring capable of supporting a broad range of ring-based advanced beam dynamics experiments. These unique features will foster a broad program in advanced accelerator R&D and accelerator education which cannot be carried out elsewhere.

TUPAC21

Performance Comparisons of Emittance-exchanger Beamlines

496

C.R. Prokop, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
B.E. Carlsten
LANL, Los Alamos, New Mexico, USA
M.D. Church, P. Piot
Fermilab, Batavia, USA

Funding: Work supported by LDRD project #20110067DR and by the U.S. DoE Contract No. DE-FG02-08ER41532 with NIU and No. DE-AC02-07CH11359 with Fermilab.
Earlier experiments at Fermilab’s A0 Photoinjector Laboratory demonstrated successful transverse-to-longitudinal emittance exchange (EEX) using a transverse-deflecting cavity (TDC) located between two identical doglegs. Such a design has the disadvantage of transversely displacing the beam. An alternative is an EEX beamline designed out of a variable R₅₆ bunch compressor chicane. In this paper, we present designs and simulation comparisons for several emittance-exchanger beamlines, including the double-dogleg and chicane designs, as well as variations of the chicane design that allow for increasing its dispersion which proportionally decreases the field-strength requirements on the TDC. These comparisons are performed with PIC models of space charge and coherent synchrotron radiation.

TUPSM24

Operation of a Diamond Field-Emission-Array Cathode in an L-Band RF-Gun

685

P. Piot, B.R. Blomberg, D. Mihalcea, H. Panuganti
Northern Illinois University, DeKalb, Illinois, USA
C.A. Brau, B.K. Choi, B.L. Ivanov, J.D. Jarvis, M.H. Mendenhall
Vanderbilt University, Nashville, USA
W.E. Gabella
Vanderbilt University, W.M. Keck Foundation Free-Electron Laser Center, Nashville, USA
P. Piot
Fermilab, Batavia, USA

We report on the operation of a field-emission diamond cathode in a L-band RF-gun (1.3 GHz) at Fermilab's HBESL facility. The diamond cathode consists of an array of a million sub-micrometric pyramidal diamond tips. Beam currents in excess of 10 mA were observed and the cathode did not show appreciable signs of degradation after days of operation. Measured Fowler-Nordheim characteristics and transverse beam densities are also reported.

TUPSM25

Multiphoton Emission from Cesium Telluride Photocathodes

688

H. Panuganti, P. Piot, C.R. Prokop
Northern Illinois University, DeKalb, Illinois, USA
P. Piot
Fermilab, Batavia, USA

The High-Brightness Electron Source Lab (HBESL) operates an L-band RF gun (1.3-GHz) that incorporates a Cesium Telluride photocathode illuminated by ultra-short (sub-100-fs) laser pulses. In this contribution we report recent studies on (1) characterizing the longitudinal phase of the photoemitted bunch in the blow-out regime using a single-shot diagnostics, (2) exploring the electron beam emission using 800 nm laser pulses (instead of the 266 nm nominal wavelength).

Paper	Title	Page
MOZBB1	The Advanced Superconducting Test Accelerator (ASTA) at Fermilab	67
	P. Piot Fermilab, Batavia, USA P. Piot Northern Illinois University, DeKalb, Illinois, USA
	Funding: This work is supported by DOE contract DE-AC02-07CH11359 to the Fermi Research Alliance LLC The Advanced Superconducting Test Accelerator (ASTA) currently in construction at Fermilab will enable a broad range of beam-based experiments to study fundamental limitations to beam intensity and to develop transformative approaches to particle-beam generation, acceleration and manipulation. ASTA incorporates a superconducting radiofrequency (SRF) linac coupled to a photoinjector and small-circumference storage ring capable of storing electrons or protons. This report describes the facility, its capabilities, and provide an overview of enabled research thrusts. see http://apc.fnal.gov/programs2/ASTA_TEMP/index.shtml
	Slides MOZBB1 [14.585 MB]

TUPAC21	Performance Comparisons of Emittance-exchanger Beamlines	496
	C.R. Prokop, P. Piot Northern Illinois University, DeKalb, Illinois, USA B.E. Carlsten LANL, Los Alamos, New Mexico, USA M.D. Church, P. Piot Fermilab, Batavia, USA
	Funding: Work supported by LDRD project #20110067DR and by the U.S. DoE Contract No. DE-FG02-08ER41532 with NIU and No. DE-AC02-07CH11359 with Fermilab. Earlier experiments at Fermilab’s A0 Photoinjector Laboratory demonstrated successful transverse-to-longitudinal emittance exchange (EEX) using a transverse-deflecting cavity (TDC) located between two identical doglegs. Such a design has the disadvantage of transversely displacing the beam. An alternative is an EEX beamline designed out of a variable R₅₆ bunch compressor chicane. In this paper, we present designs and simulation comparisons for several emittance-exchanger beamlines, including the double-dogleg and chicane designs, as well as variations of the chicane design that allow for increasing its dispersion which proportionally decreases the field-strength requirements on the TDC. These comparisons are performed with PIC models of space charge and coherent synchrotron radiation.

TUPSM24	Operation of a Diamond Field-Emission-Array Cathode in an L-Band RF-Gun	685
	P. Piot, B.R. Blomberg, D. Mihalcea, H. Panuganti Northern Illinois University, DeKalb, Illinois, USA C.A. Brau, B.K. Choi, B.L. Ivanov, J.D. Jarvis, M.H. Mendenhall Vanderbilt University, Nashville, USA W.E. Gabella Vanderbilt University, W.M. Keck Foundation Free-Electron Laser Center, Nashville, USA P. Piot Fermilab, Batavia, USA
	We report on the operation of a field-emission diamond cathode in a L-band RF-gun (1.3 GHz) at Fermilab's HBESL facility. The diamond cathode consists of an array of a million sub-micrometric pyramidal diamond tips. Beam currents in excess of 10 mA were observed and the cathode did not show appreciable signs of degradation after days of operation. Measured Fowler-Nordheim characteristics and transverse beam densities are also reported.

TUPSM25	Multiphoton Emission from Cesium Telluride Photocathodes	688
	H. Panuganti, P. Piot, C.R. Prokop Northern Illinois University, DeKalb, Illinois, USA P. Piot Fermilab, Batavia, USA
	The High-Brightness Electron Source Lab (HBESL) operates an L-band RF gun (1.3-GHz) that incorporates a Cesium Telluride photocathode illuminated by ultra-short (sub-100-fs) laser pulses. In this contribution we report recent studies on (1) characterizing the longitudinal phase of the photoemitted bunch in the blow-out regime using a single-shot diagnostics, (2) exploring the electron beam emission using 800 nm laser pulses (instead of the 266 nm nominal wavelength).

MOPAC15	ASTA at Fermilab: Accelerator Physics and Accelerator Education Programs at the Modern Accelerator R&D Users Facility for HEP and Accelerator Applications	96
	V.D. Shiltsev Fermilab, Batavia, USA P. Piot Northern Illinois University, DeKalb, Illinois, USA
	We present the current and planned accelerator physics program at accelerator education program at ASTA (Advanced Superconducting Test Accelerator). It will enable a broad range of beam-based experiments to study fundamental limitations to beam intensity and to develop transformative approaches to particle-beam generation, acceleration and manipulation. ASTA incorporates a superconducting radiofrequency (SRF) linac coupled to a photoinjector and small-circumference storage ring capable of storing electrons or protons. ASTA will establish a unique resource for R&D towards Energy Frontier facilities and a test-bed for SRF accelerators and high-brightness beam applications. The unique features of ASTA include: (1) a high repetition-rate, (2) one of the highest peak and average brightness within the U.S., (3)a GeV-scale beam energy, (4) an extremely stable beam, (5) the availability of SRF and high-quality beams together, and (6) a storage ring capable of supporting a broad range of ring-based advanced beam dynamics experiments. These unique features will foster a broad program in advanced accelerator R&D and accelerator education which cannot be carried out elsewhere.

TUPAC21	Performance Comparisons of Emittance-exchanger Beamlines	496
	C.R. Prokop, P. Piot Northern Illinois University, DeKalb, Illinois, USA B.E. Carlsten LANL, Los Alamos, New Mexico, USA M.D. Church, P. Piot Fermilab, Batavia, USA
	Funding: Work supported by LDRD project #20110067DR and by the U.S. DoE Contract No. DE-FG02-08ER41532 with NIU and No. DE-AC02-07CH11359 with Fermilab. Earlier experiments at Fermilab’s A0 Photoinjector Laboratory demonstrated successful transverse-to-longitudinal emittance exchange (EEX) using a transverse-deflecting cavity (TDC) located between two identical doglegs. Such a design has the disadvantage of transversely displacing the beam. An alternative is an EEX beamline designed out of a variable R₅₆ bunch compressor chicane. In this paper, we present designs and simulation comparisons for several emittance-exchanger beamlines, including the double-dogleg and chicane designs, as well as variations of the chicane design that allow for increasing its dispersion which proportionally decreases the field-strength requirements on the TDC. These comparisons are performed with PIC models of space charge and coherent synchrotron radiation.

TUPSM24	Operation of a Diamond Field-Emission-Array Cathode in an L-Band RF-Gun	685
	P. Piot, B.R. Blomberg, D. Mihalcea, H. Panuganti Northern Illinois University, DeKalb, Illinois, USA C.A. Brau, B.K. Choi, B.L. Ivanov, J.D. Jarvis, M.H. Mendenhall Vanderbilt University, Nashville, USA W.E. Gabella Vanderbilt University, W.M. Keck Foundation Free-Electron Laser Center, Nashville, USA P. Piot Fermilab, Batavia, USA
	We report on the operation of a field-emission diamond cathode in a L-band RF-gun (1.3 GHz) at Fermilab's HBESL facility. The diamond cathode consists of an array of a million sub-micrometric pyramidal diamond tips. Beam currents in excess of 10 mA were observed and the cathode did not show appreciable signs of degradation after days of operation. Measured Fowler-Nordheim characteristics and transverse beam densities are also reported.

TUPSM25	Multiphoton Emission from Cesium Telluride Photocathodes	688
	H. Panuganti, P. Piot, C.R. Prokop Northern Illinois University, DeKalb, Illinois, USA P. Piot Fermilab, Batavia, USA
	The High-Brightness Electron Source Lab (HBESL) operates an L-band RF gun (1.3-GHz) that incorporates a Cesium Telluride photocathode illuminated by ultra-short (sub-100-fs) laser pulses. In this contribution we report recent studies on (1) characterizing the longitudinal phase of the photoemitted bunch in the blow-out regime using a single-shot diagnostics, (2) exploring the electron beam emission using 800 nm laser pulses (instead of the 266 nm nominal wavelength).