Absolute energy measurement of heavy ion beams using a resonant time-of-flight system

Pardo, R. C.; Clifft, B.E.; DenHartog, P.; Kovar, D. G.; Kutschera, W.; Rehm, K. E.

doi:10.1016/0168-9002(88)90689-4

Cited by 18 publications

(4 citation statements)

References 4 publications

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“…The energy of the 13 N 7+ beam was determined using the magnetic rigidity of the beam passing through a bending magnet located upstream of the target. This magnet is used for separating the 13 N beam from the primary 12 C beam with the field settings calibrated from previous stable beam measurements for which the energies have been measured using the AT-LAS time-of-flight system [9]. The beam energy of the secondary 13 N was calculated to be 34.6 ± 0.7 MeV.…”

Section: Methodsmentioning

confidence: 99%

First direct measurement of the $^{13}$N($α$,$p$)$^{16}$O reaction relevant for core-collapse supernovae nucleosynthesis

Jayatissa,

Avila,

Rehm

et al. 2022

Preprint

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Understanding the explosion mechanism of a core-collapse supernova (CCSN) is important to accurately model CCSN scenarios for different progenitor stars using model-observation comparisons. The uncertainties of various nuclear reaction rates relevant for CCSN scenarios strongly affect the accuracy of these stellar models. Out of these reactions, the 13 N(α,p) 16 O reaction has been found to affect various stages of a CCSN at varying temperatures. This work presents the first direct measurement of the 13 N(α,p) 16 O reaction performed using a 34.6 MeV beam of radioactive 13 N ions and the active-target detector MUSIC (MUlti-Sampling Ionization Chamber) at Argonne National Laboratory. The resulting total 13 N(α,p) 16 O reaction cross sections from this measurement in the center-of-mass energy range of 3.26 -6.02 MeV are presented and compared with calculations using the Hauser-Feshbach formalism. Uncertainties in the reaction rate have been dramatically reduced at CCSN temperatures.

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Section: Methodsmentioning

confidence: 99%

First direct measurement of the $^{13}$N($α$,$p$)$^{16}$O reaction relevant for core-collapse supernovae nucleosynthesis

Jayatissa,

Avila,

Rehm

et al. 2022

Preprint

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“…TOF systems represent a space and cost efficient solution when it is directly accommodated in primary beam transport lines. TOF can be implemented to be fully non-intercepting, so beam energy is continuously monitored while delivering beams to experiments [3,4]. However, non-intercepting TOF devices make use of electromagnetic pickups and require beam currents which are typically orders of magnitude higher than intensities of radioactive beams produced at ISAC.…”

Section: Introductionmentioning

confidence: 99%

ISAC time-of-flight system with laser-based calibration

Verzilov

2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…More sophisticated applications rely on accurately determining the phase of the induced rf signal to measure the beam arrival time at the detection cavity or, effectively, the time of flight (TOF) between two cavities. If the amplitude of the induced rf field is compared in resonant cavities operating at two or more significantly different harmonics, then bunch width information may also be obtained [4]. Up to now, such systems have been based on a variety of roomtemperature normal-conducting cavities.…”

Section: Introductionmentioning

confidence: 99%

Superconducting resonator used as a beam phase detector

Sharamentov

Pardo

Ostroumov

et al. 2003

Phys. Rev. ST Accel. Beams

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Beam-bunch arrival time has been measured for the first time by operating superconducting cavities, normally part of the linac accelerator array, in a bunch-detecting mode. The very high Q of the superconducting cavities provides high sensitivity and allows for phase-detecting low-current beams. In detecting mode, the resonator is operated at a very low field level comparable to the field induced by the bunched beam. Because of this, the rf field in the cavity is a superposition of a ''pure'' (or reference) rf and the beam-induced signal. A new method of circular phase rotation (CPR), allowing extraction of the beam phase information from the composite rf field was developed. Arrival time phase determination with CPR is better than 1 (at 48 MHz) for a beam current of 100 nA. The electronics design is described and experimental data are presented.

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Absolute energy measurement of heavy ion beams using a resonant time-of-flight system

Cited by 18 publications

References 4 publications

First direct measurement of the $^{13}$N($α$,$p$)$^{16}$O reaction relevant for core-collapse supernovae nucleosynthesis

First direct measurement of the $^{13}$N($α$,$p$)$^{16}$O reaction relevant for core-collapse supernovae nucleosynthesis

ISAC time-of-flight system with laser-based calibration

Superconducting resonator used as a beam phase detector

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