GEANT4 simulations for γ-ray detector array design for inplasma β-decays studies of nuclear astrophysics interest

Naselli, E.; Santonocito, D.; Amaducci, S.; Celona, L.; Galatà, A.; Mauro, G. S.; Mazzaglia, M.; Mishra, Biswajit; Pidatella, Angelo; Torrisi, Giuseppe

doi:10.1051/epjconf/202327913006

Cited by 2 publications

(12 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the species of interest for this work, i.e. 48 The molecular flux and number density are then solved for on all surfaces, using a finite element method (FEM) solver in a stationary study. The flow is computed by integrating the flux arriving at a surface from all other points in its line of sight.…”

Section: Fluid Dynamics Stationary Studymentioning

confidence: 99%

“…As introduced in section 1, the technique adopted for the βdecay rate measurement in PANDORA is based on the γtagging of the EM emission from the excited daughter nuclei. The position of each detector, as shown in figure 1, was carefully designed aiming at improving the StB ratio, including a large background noise, mainly arising from the plasma selfemission (N bk pl ) [48]. However, additional sources of noise must be included.…”

Section: Model Of Space-dependent γ Activity Of Deposited Nucleimentioning

confidence: 99%

“…The simulation time was set to 12 h and 120 d, for 134 Cs and 176 Lu, respectively, as being the expected measurement times. These times are beyond the minimum measurement times to reach a 3-σ significance level of signal's detection [13,48]. In the simulation, we updated in time and point-by-point at the chamber wall the residual nuclei and the number of β-decay events.…”

Section: Model Of Space-dependent γ Activity Of Deposited Nucleimentioning

confidence: 99%

“…Numerical simulations could help in providing predictions on the evaporation dynamics, to improve the technique's overall efficiency and ion source performance, as well as to reduce consumption of rare and expensive isotopes (e.g. 48 Ca) most frequently used by the nuclear physics community. Moreover, novel upcoming ECR plasma facilities, as the Plasmas for Astrophysics, Nuclear Decays Observation and Radiation for Archaeometry (PANDORA) plasma trap [12], will be employed to carry out interdisciplinary research spanning from nuclear physics to astrophysics, where inplasma high charge states of metallic ion species are demanded.…”

Section: Introductionmentioning

confidence: 99%

“…134 Cs). The same ECR plasma and trap have been used to study the ionisation of 48 Ca, whose dynamics of coupling with the plasma is relevant for the ion sources community, although the nucleus is not among the Figure 1. Sketch of the PANDORA plasma chamber design performed in GEANT4 [18,19] surrounded by superconducting coils (yellow) and sextupole magnets (red).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Metal evaporation dynamics in electron cyclotron resonance ion sources: plasma role in the atom diffusion, ionisation, and transport

Pidatella,

Mascali,

Galatà

et al. 2024

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

We present a numerical study of metals dynamics evaporated through resistively heated ovens in electron cyclotron resonance (ECR) plasma traps, used as metal ion beam injectors for accelerators and multi-disciplinary research in plasma physics. We use complementary numerical methods to perform calculations in the framework of the PANDORA trap. The diffusion and deposition of metal vapours at the plasma chamber’s surface are explored under molecular flow regime, with stationary and time-dependent particle fluid calculations via COMSOL Multiphysics®. The ionisation of vapours is then studied in the strongly energised ECR plasma. We have developed a Monte Carlo (MC) code to simulate the in-plasma metal ions’ dynamics, coupled to particle-in-cell simulations of the plasma physics in the trap. The presence of strongly inhomogeneous plasmas leads to charge-exchange and electron-impactionisations of metals, in turn affecting the deposition rate/pattern of the metal on the walls of the trap. Results show how vapours dynamics depends both on evaporated metals and the plasma target. The 134Cs, 176Lu, and 48Ca isotopes were investigated, the first two being radioisotopes interesting for the PANDORA project, and the third as one of the most required rare isotope by the nuclearphysics community. We present an application of the study: MC computing the γ activity due to the deposited radioactive neutral nuclei during the measurement time, we quantitatively estimated the overall γ-detection system’s efficiency using GEANT4, including the poisoning γ-signal from the walls of the trap, relevant for the γ-tagging of short-lived nuclei’s decay rate in the PANDORA experiment.This work can give valuable support both to the evaporation technique and plasma source optimisation, for improving the metal ion beam production, avoiding huge deposit/waste of metals known to affect the long-term source stability, as well as for radio-safety aspects and reducing material waste in case of rare isotopes.

show abstract

Section: Fluid Dynamics Stationary Studymentioning

confidence: 99%

Section: Model Of Space-dependent γ Activity Of Deposited Nucleimentioning

confidence: 99%

Section: Model Of Space-dependent γ Activity Of Deposited Nucleimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Metal evaporation dynamics in electron cyclotron resonance ion sources: plasma role in the atom diffusion, ionisation, and transport

Pidatella,

Mascali,

Galatà

et al. 2024

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

Experimental study of ECR plasmas in stationary versus turbulent regimes for in-plasma $$\beta$$-decay investigations

Naselli

2023

Eur. Phys. J. Plus

View full text Add to dashboard Cite

A new experimental study of electron cyclotron resonance (ECR) plasmas in stationary versus turbulent regimes was recently carried out in the framework of the PANDORA (plasmas for astrophysics, nuclear decays observation and radiation for archaeometry) project, which aims to measure $$\beta$$ β -decays of nuclear astrophysical interest for the first time in laboratory plasmas emulating some stellar-like conditions. The experimental study was finalized to correlate the nuclear activity to the thermodynamic conditions of the plasma environment by means of a multi-diagnostic approach. Advanced analysis methods and non-invasive tools were properly developed, including high-resolution space-resolved X-ray spectroscopy and imaging, which allow unprecedented investigations of thermodynamic plasma properties as well as of plasma structure, confinement and dynamics of losses. Furthermore, an innovative plasma heating mode (two-close-frequency heating) has been investigated, showing to be a powerful method for improving the plasma stability, damping instabilities. In order to correlate plasma properties to nuclear activity, GEANT4 simulations devoted to design a $$\gamma$$ γ -ray detector array to tag the in-plasma $$\beta$$ β -decays by detecting $$\gamma$$ γ -rays emitted by daughters nuclei were carried out. The sensitivity of the PANDORA setup was specifically investigated in a virtual experiment, for the first PANDORA physics cases: $$^{134}$$ 134 Cs, $$^{176}$$ 176 Lu, $$^{94}$$ 94 Nb. The obtained results allowed to demonstrate that laboratory ECR plasmas in compact traps are suitable and interesting environments for fundamental studies as well as for applications.

show abstract

GEANT4 simulations for γ-ray detector array design for inplasma β-decays studies of nuclear astrophysics interest

Cited by 2 publications

References 22 publications

Metal evaporation dynamics in electron cyclotron resonance ion sources: plasma role in the atom diffusion, ionisation, and transport

Metal evaporation dynamics in electron cyclotron resonance ion sources: plasma role in the atom diffusion, ionisation, and transport

Experimental study of ECR plasmas in stationary versus turbulent regimes for in-plasma $$\beta$$-decay investigations

Contact Info

Product

Resources

About