IBIC2022 - List of Keywords (antiproton)

Paper	Title	Other Keywords	Page
TUP30	Beam Intensity Measurement in ELENA Using Orbit Pick-Ups	proton, simulation, feedback, pick-up	296
	O. Marqversen, D. Alves CERN, Meyrin, Switzerland
	A bunched beam intensity measurement system for the CERN Extra Low ENergy Antiproton (ELENA) ring, using a cylindrical shoe-box electrostatic pick-up from the existing orbit system [1], is presented. The system has been developed to measure very challenging beam cur-rents, as low as 200nA corresponding to intensities of the order of 10⁷ antiprotons circulating with a relativistic beta of the order of 10-2. In this work we derive and show that the turn-by-turn beam intensity is proportional to the baseline of the sum signal and that, despite the AC-coupling of the system, the installed front-end electronics, based on a charge amplifier, not only guarantees the preservation of the bunch shape (up to a few tens of MHz), but also allows for an absolute calibration of the system. In addition, the linearity of the intensity measurements and their inde-pendence with respect to average beam position is evalu-ated using a standard electromagnetic simulation tool. Finally, experimental measurements throughout typical antiproton deceleration cycles are presented and their accuracy and precision are discussed.
	Poster TUP30 [1.102 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP30
About •	Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 01 November 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEP30	Creation of the First High-Inductance Sensor of the New CCC-Sm Series	shielding, pick-up, cryogenics, resonance	469
	V. Tympel, T. Stöhlker HIJ, Jena, Germany L. Crescimbeni, D.M. Haider, M. Schwickert, T. Sieber, T. Stöhlker GSI, Darmstadt, Germany F. Machalett, T. Stöhlker IOQ, Jena, Germany M. Schmelz, T. Schönau, R. Stolz, V. Zakosarenko IPHT, Jena, Germany F. Schmidl, T. Schönau, P. Seidel FSU Jena, Jena, Germany V. Zakosarenko Supracon AG, Jena, Germany
	Funding: Supported by the BMBF, project number 05P21SJRB1. Cryogenic Current Comparators (CCC) are presently used at CERN-AD (100 mm beamline diameter) and in the FAIR project at CRYRING (150 mm beamline diameter) for non-destructive absolute measurement of beam currents below 20 ’A (current resolution 10 nA). Both sensor versions (CERN-Nb-CCC and FAIR-Nb-CCC-XD) use niobium as superconductor for the DC-transformer and magnetic shielding. The integrated flux concentrators have an inductance of below 100 ’H at 4.2 Kelvin. The new Sm-series (smart & small) is designed for a beamline diameter of 63 mm and uses lead for the superconducting shield. The first sensor (IFK-Pb-DCCC-Sm-200) has two core-based pickup coils (2x 100 µH at 4.2 K) and two SQUID units, to eliminate Barkhausen current jumps as part of the low frequency 1/f-noise. During the construction some basic experiments on noise behavior (fluctuation’dissipation theorem, white noise below 2 pA/sqrt(Hz)) and magnetic shielding (flux concentrator and shielding as LC circuit resonance , additional mu-metal shielding) were undertaken, the results of which are presented here. Finally, a current resolution of 500 pA could be achieved in the laboratory.
	Poster WEP30 [1.474 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP30
About •	Received ※ 05 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 12 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUP30

Beam Intensity Measurement in ELENA Using Orbit Pick-Ups

proton, simulation, feedback, pick-up

296

O. Marqversen, D. Alves
CERN, Meyrin, Switzerland

A bunched beam intensity measurement system for the CERN Extra Low ENergy Antiproton (ELENA) ring, using a cylindrical shoe-box electrostatic pick-up from the existing orbit system [1], is presented. The system has been developed to measure very challenging beam cur-rents, as low as 200nA corresponding to intensities of the order of 10⁷ antiprotons circulating with a relativistic beta of the order of 10-2. In this work we derive and show that the turn-by-turn beam intensity is proportional to the baseline of the sum signal and that, despite the AC-coupling of the system, the installed front-end electronics, based on a charge amplifier, not only guarantees the preservation of the bunch shape (up to a few tens of MHz), but also allows for an absolute calibration of the system. In addition, the linearity of the intensity measurements and their inde-pendence with respect to average beam position is evalu-ated using a standard electromagnetic simulation tool. Finally, experimental measurements throughout typical antiproton deceleration cycles are presented and their accuracy and precision are discussed.

Poster TUP30 [1.102 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP30

About •

Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 01 November 2022

Cite •

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

WEP30

Creation of the First High-Inductance Sensor of the New CCC-Sm Series

shielding, pick-up, cryogenics, resonance

469

V. Tympel, T. Stöhlker
HIJ, Jena, Germany
L. Crescimbeni, D.M. Haider, M. Schwickert, T. Sieber, T. Stöhlker
GSI, Darmstadt, Germany
F. Machalett, T. Stöhlker
IOQ, Jena, Germany
M. Schmelz, T. Schönau, R. Stolz, V. Zakosarenko
IPHT, Jena, Germany
F. Schmidl, T. Schönau, P. Seidel
FSU Jena, Jena, Germany
V. Zakosarenko
Supracon AG, Jena, Germany

Funding: Supported by the BMBF, project number 05P21SJRB1.
Cryogenic Current Comparators (CCC) are presently used at CERN-AD (100 mm beamline diameter) and in the FAIR project at CRYRING (150 mm beamline diameter) for non-destructive absolute measurement of beam currents below 20 ’A (current resolution 10 nA). Both sensor versions (CERN-Nb-CCC and FAIR-Nb-CCC-XD) use niobium as superconductor for the DC-transformer and magnetic shielding. The integrated flux concentrators have an inductance of below 100 ’H at 4.2 Kelvin. The new Sm-series (smart & small) is designed for a beamline diameter of 63 mm and uses lead for the superconducting shield. The first sensor (IFK-Pb-DCCC-Sm-200) has two core-based pickup coils (2x 100 µH at 4.2 K) and two SQUID units, to eliminate Barkhausen current jumps as part of the low frequency 1/f-noise. During the construction some basic experiments on noise behavior (fluctuation’dissipation theorem, white noise below 2 pA/sqrt(Hz)) and magnetic shielding (flux concentrator and shielding as LC circuit resonance , additional mu-metal shielding) were undertaken, the results of which are presented here. Finally, a current resolution of 500 pA could be achieved in the laboratory.

Poster WEP30 [1.474 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP30

About •

Received ※ 05 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 12 September 2022

Cite •

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