IBIC2022 - List of Keywords (booster)

Paper	Title	Other Keywords	Page
MOP02	An Optical Diagnostic Beamline for the Bessy II Booster	cavity, injection, diagnostics, operation	19
	T. Atkinson, J.-G. Hwang, G. Rehm, M. Ries, G. Schiwietz, S. Wiese HZB, Berlin, Germany
	As part of the global refurbishment of the injector at BESSY II, a new optical beamline has been installed in the booster. This paper covers the conceptual design: incorporating the beamline into an operational facility without downtime, the simulation and expectations of the optical transport line, mechanical installation and commissioning with beam. These first results with the present beam delivery system have already achieved source point imaging and bunch length measurements using a fast diode. With the additional PETRA cavity installed for this booster upgrade and connection to acquire RF power in the 2022 summer shutdown planned, the bunch length diagnostics are critical. The beamline will also undergo a final mechanical upgrade and then see the installation of a streak camera.
	Poster MOP02 [0.975 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP02
About •	Received ※ 05 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 11 December 2022 — Issue date ※ 12 December 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP28	Improvements in Longitudinal Phase Space Tomography at PITZ	electron, experiment, space-charge, gun	105
	N. Aftab, Z. Aboulbanine, P. Boonpornprasert, G.Z. Georgiev, J. Good, M. Groß, A. Hoffmann, M. Krasilnikov, X.-K. Li, A. Lueangaramwong, R. Niemczyk, A. Oppelt, H.J. Qian, C.J. Richard, F. Stephan, G. Vashchenko DESY Zeuthen, Zeuthen, Germany W. Hillert University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany A.J. Reader KCL, London, United Kingdom
	Methodical studies to improve the longitudinal phase space (LPS) tomography of space-charge dominated electron beams were carried out at the Photo Injector Test facility at DESY in Zeuthen (PITZ). An analytical model was developed to quantify mean momentum, RMS energy spread, bunch length and phase advance. Phase advance analysis determined the booster phase scan range and step size to be used for obtaining momentum projections. A slit was introduced before the booster to truncate the beam in transverse plane to strongly reduce the space charge effects. The signal resolution of this truncated beam was improved by careful beta function control at the reference screen of the momentum measurements. The reconstruction algorithm was changed from Algebraic Reconstruction Technique (ART) to Image Space Reconstruction Algorithm (ISRA) owing to its assurance of non-negative solutions. In addition, the initial physically justified assumption of LPS, based on low-energy section measurements, was established to clear out noise-like artefacts. This paper will highlight the improvements made in the LPS tomography and compare the simulated and experimental results.
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP28
About •	Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 15 October 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP35	New Measurements Using Libera-Spark Electronics at ESRF: The High Quality Phase-Monitor and the Single-Electron	electron, injection, SRF, synchrotron	129
	E. Buratin, N. Benoist, P.B. Borowiec, G. Denat, J. Jacob, K.B. Scheidt, F. Taoutaou ESRF, Grenoble, France
	Several new diagnostics have been installed and exploited at the ESRF’s new Extremely Brilliant Source (EBS) in 2022. A Libera-Spark BPM device has been implemented to measure the phase of Booster and EBS rings, with high resolution and up to turn-by-turn rate. In the Storage Ring we achieved irrefutably the control, injection and measurement of single electron(s) with the use of transfer-line screens, the visible-light extraction system and a low-cost photo-multiplier tube, combined with the commercial Spark Beam Loss Monitor. Further planned developments, like the TCPC technique, on this are on-going and will be essential to verify that our Booster cleaning process reaches a level of zero-electron bunch pollution in EBS.
	Poster MOP35 [2.094 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP35
About •	Received ※ 05 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 17 November 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEP31	Booster Fillpattern Monitor	electron, storage-ring, injection, extraction	473
	F. Falkenstern, J. Kuszynski, G. Rehm HZB, Berlin, Germany
	The "Booster Fillpattern Monitor" is used to measure currents in each individual electron bunch in the booster of the BESSY II machine. The booster with its circumference of 96 meters has space for max.160 electron bunches. The distance between the electron bunches of 60cm (96m/160) is determined by the RF Master Clock ~ 499, 627MHz. In practice, fill patterns of a one to five equally spaced bunches are in use. The fill pattern monitor digitizes electrical pulses generated from a strip line using a broadband ADC. The sampling frequency is selected as an integer fraction of the bunching frequency, acquiring the full fill pattern over a number of turns. Experiments performed at BESSY II demonstrate the performance of the setup and will be discussed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP31
About •	Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 24 October 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOP02

An Optical Diagnostic Beamline for the Bessy II Booster

cavity, injection, diagnostics, operation

19

T. Atkinson, J.-G. Hwang, G. Rehm, M. Ries, G. Schiwietz, S. Wiese
HZB, Berlin, Germany

As part of the global refurbishment of the injector at BESSY II, a new optical beamline has been installed in the booster. This paper covers the conceptual design: incorporating the beamline into an operational facility without downtime, the simulation and expectations of the optical transport line, mechanical installation and commissioning with beam. These first results with the present beam delivery system have already achieved source point imaging and bunch length measurements using a fast diode. With the additional PETRA cavity installed for this booster upgrade and connection to acquire RF power in the 2022 summer shutdown planned, the bunch length diagnostics are critical. The beamline will also undergo a final mechanical upgrade and then see the installation of a streak camera.

Poster MOP02 [0.975 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP02

About •

Received ※ 05 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 11 December 2022 — Issue date ※ 12 December 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP28

Improvements in Longitudinal Phase Space Tomography at PITZ

electron, experiment, space-charge, gun

105

N. Aftab, Z. Aboulbanine, P. Boonpornprasert, G.Z. Georgiev, J. Good, M. Groß, A. Hoffmann, M. Krasilnikov, X.-K. Li, A. Lueangaramwong, R. Niemczyk, A. Oppelt, H.J. Qian, C.J. Richard, F. Stephan, G. Vashchenko
DESY Zeuthen, Zeuthen, Germany
W. Hillert
University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
A.J. Reader
KCL, London, United Kingdom

Methodical studies to improve the longitudinal phase space (LPS) tomography of space-charge dominated electron beams were carried out at the Photo Injector Test facility at DESY in Zeuthen (PITZ). An analytical model was developed to quantify mean momentum, RMS energy spread, bunch length and phase advance. Phase advance analysis determined the booster phase scan range and step size to be used for obtaining momentum projections. A slit was introduced before the booster to truncate the beam in transverse plane to strongly reduce the space charge effects. The signal resolution of this truncated beam was improved by careful beta function control at the reference screen of the momentum measurements. The reconstruction algorithm was changed from Algebraic Reconstruction Technique (ART) to Image Space Reconstruction Algorithm (ISRA) owing to its assurance of non-negative solutions. In addition, the initial physically justified assumption of LPS, based on low-energy section measurements, was established to clear out noise-like artefacts. This paper will highlight the improvements made in the LPS tomography and compare the simulated and experimental results.

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP28

About •

Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 15 October 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP35

New Measurements Using Libera-Spark Electronics at ESRF: The High Quality Phase-Monitor and the Single-Electron

electron, injection, SRF, synchrotron

129

E. Buratin, N. Benoist, P.B. Borowiec, G. Denat, J. Jacob, K.B. Scheidt, F. Taoutaou
ESRF, Grenoble, France

Several new diagnostics have been installed and exploited at the ESRF’s new Extremely Brilliant Source (EBS) in 2022. A Libera-Spark BPM device has been implemented to measure the phase of Booster and EBS rings, with high resolution and up to turn-by-turn rate. In the Storage Ring we achieved irrefutably the control, injection and measurement of single electron(s) with the use of transfer-line screens, the visible-light extraction system and a low-cost photo-multiplier tube, combined with the commercial Spark Beam Loss Monitor. Further planned developments, like the TCPC technique, on this are on-going and will be essential to verify that our Booster cleaning process reaches a level of zero-electron bunch pollution in EBS.

Poster MOP35 [2.094 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP35

About •

Received ※ 05 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 17 November 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEP31

Booster Fillpattern Monitor

electron, storage-ring, injection, extraction

473

F. Falkenstern, J. Kuszynski, G. Rehm
HZB, Berlin, Germany

The "Booster Fillpattern Monitor" is used to measure currents in each individual electron bunch in the booster of the BESSY II machine. The booster with its circumference of 96 meters has space for max.160 electron bunches. The distance between the electron bunches of 60cm (96m/160) is determined by the RF Master Clock ~ 499, 627MHz. In practice, fill patterns of a one to five equally spaced bunches are in use. The fill pattern monitor digitizes electrical pulses generated from a strip line using a broadband ADC. The sampling frequency is selected as an integer fraction of the bunching frequency, acquiring the full fill pattern over a number of turns. Experiments performed at BESSY II demonstrate the performance of the setup and will be discussed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP31

About •

Received ※ 06 September 2022 — Revised ※ 12 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 24 October 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)