scholarly journals Production of the isotope copper-64 by using natural nickel target with proton energy 17 MeV and beam current 10 μA at cyclotron

2021 ◽  
Vol 2103 (1) ◽  
pp. 012143
Author(s):  
A Tiba ◽  
Ya A Berdnikov ◽  
Yu A Egorov
Keyword(s):  
Nuclear Medicine ◽  
Nuclear Reaction ◽  
Proton Beam ◽  
Calculation Method ◽  
Proton Energy ◽  
Target Material ◽  
Beam Current

Abstract A calculation method is developed for production of the copper-64 isotope from the 64Ni(p, n)64Cu nuclear reaction. The 64Cu radioisotope used in nuclear medicine is produced by irradiating a natural nickel target with a proton beam produced on a cyclotron. The conditions of the production were dictated by the capabilities of the cyclotron. The energy of the protons was 17 MeV (the beam current is 10 μॅ). As a result, the activity of copper-64 isotope for various irradiation times were obtained. The depth of proton penetration into the target material was studied.

scholarly journals Dielectric-Filled Reentrant Cavity Resonator as a Low-Intensity Proton Beam Diagnostic

Instruments ◽  
2018 ◽  
Vol 2 (4) ◽  
pp. 24 ◽  
Author(s):  
Sudharsan Srinivasan ◽  
Pierre-André Duperrex
Keyword(s):  
Resonance Frequency ◽  
Proton Beam ◽  
Second Harmonic ◽  
Cavity Resonator ◽  
Beam Current ◽  
Dielectric Thickness ◽  
Medical Treatment Facility ◽  
Beam Currents ◽  
Paul Scherrer ◽  
Non Destructive

Measurement of the proton beam current (0.1–40 nA) at the medical treatment facility PROSCAN at the Paul Scherrer Institut (PSI) is performed with ionization chambers. To mitigate the scattering issues and to preserve the quality of the beam delivered to the patients, a non-interceptive monitor based on the principle of a reentrant cavity resonator has been built. The resonator with a fundamental resonance frequency of 145.7 MHz was matched to the second harmonic of the pulse repetition rate (72.85 MHz) of the beam extracted from the cyclotron. This was realized with the help of ANSYS HFSS (High Frequency Structural Simulator) for network analysis. Both, the pickup position and dielectric thickness were optimized. The prototype was characterized with a stand-alone test bench. There is good agreement between the simulated and measured parameters. The observed deviation in the resonance frequency is attributed to the frequency dependent dielectric loss tangent. Hence, the dielectric had to be resized to tune the resonator to the design resonance frequency. The measured sensitivity performances were in agreement with the expectations. We conclude that the dielectric reentrant cavity resonator is a promising candidate for measuring low proton beam currents in a non-destructive manner.

Characterization of FIB Damage in Silicon

1999 ◽  
Vol 5 (S2) ◽  
pp. 740-741 ◽  
Author(s):  
C.A. Urbanik ◽  
B.I. Prenitzer ◽  
L.A. Gianhuzzi ◽  
S.R. Brown ◽  
T.L. Shofner ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Target Material ◽  
Beam Current ◽  
Specimen Preparation ◽  
Transfer Energy ◽  
Transmission Electron ◽  
Preparation Techniques ◽  
Reactive Gas

Focused ion beam (FIB) instruments are useful for high spatial resolution milling, deposition, and imaging capabilities. As a result, FIB specimen preparation techniques have been widely accepted within the semiconductor community as a means to rapidly prepare high quality, site-specific specimens for transmission electron microscopy (TEM) [1]. In spite of the excellent results that have been observed for both high resolution (HREM) and standard TEM specimen preparation applications, a degree of structural modification is inherent to FIB milled surfaces [2,3]. The magnitude of the damage region that results from Ga+ ion bombardment is dependent on the operating parameters of the FIB (e.g., beam current, beam voltage, milling time, and the use of reactive gas assisted etching).Lattice defects occur as a consequence of FIB milling because the incident ions transfer energy to the atoms of the target material. Momentum transferred from the incident ions to the target atoms can result in the creation of point defects (e.g., vacancies, self interstitials, and interstitial and substitutional ion implantation), the generation of phonons, and plasmon excitation in the case of metal targets.

The use of a Perovskite crystal as a detector for proton beam current

1992 ◽  
Vol 39 (1) ◽  
pp. 25-28 ◽  
Author(s):  
P.E. Cruvinel ◽  
S. Mascarenhas ◽  
J. Miranda ◽  
R.G. Flocchini
Keyword(s):  
Proton Beam ◽  
Beam Current ◽  
Perovskite Crystal

Neutronic and Physical Characteristics of an Accelerator Driven System with a Lead-208 Coolant

2006 ◽  
Author(s):  
Georgy L. Khorasanov ◽  
Anatoly P. Ivonov ◽  
Anatoly I. Blokhin
Keyword(s):  
Proton Beam ◽  
Neutron Source ◽  
Lead Isotope ◽  
External Source ◽  
Beam Current ◽  
Thermal Capacity ◽  
Multiplication Factor ◽  
The Core ◽  
Effective Multiplication Factor ◽  
Effective Multiplication

In the paper a possibility of using a lead isotope, pure Pb-208, as a coolant for a subcritical core of 80 MW thermal capacity of the PDS-XADS type facility is considered. Calculations of neutronic characteristics were performed using Monte Carlo technique. The following initial data were chosen: an annular core with a target, as a neutron source, at its centre; the core coolant — Pb-208 (100%); a fuel — a mix of mono nitrides of depleted uranium and power plutonium with a small share of neptunium and americium; the target coolant — a modified lead and bismuth eutectic, Pb-208(80%)-Bi(20%); proton beam energy — 600 MeV; effective multiplication factor of the core under operation — Keff = 0.97; thermal capacity of the core — N = 80 MW. From calculations performed it follows that in using Pb-208 as the core coolant the necessary intensity of the external source of neutrons to deliver 80 MW thermal capacity is equal to S = 2.29−1017 n/s that corresponds to proton beam current Ip = 2.8 mA and beam capacity Pp = 1.68 MW. In using natural lead instead of Pb-208 as the core coolant, effective multiplication factor of the core in normal operating regime falls down to the value equal to Keff = 0.95. In these conditions multiplication of external neutrons in the core and thermal capacity of the subcritical core are below nominal by 1.55 times. For achievement the rated core power N = 80 MW it is required on ∼20–30% to increase the fuel loading and volume of the core, or by 1.55 times to increase intensity of the external source of neutrons. In the last case, the required parameters of the neutron source and of the corresponding proton beam are following: intensity of the neutron source S = 3.55·1017 n/s., beam current Ip = 4.32 mA, beam capacity Pp = 2.59 MW. To exploit the accelerator with the reduced proton beam current it will be required about 56 tons of Pb-208, as a minimum, for the core coolant. Charges for its obtaining can be recovered at the expense of the economy of the proton accelerator construction cost. In this case, the acceptable price of the lead isotope Pb-208 must be less than $2,860/kg.

On-line measurements of proton beam current from a PET cyclotron using a thin aluminum foil

2013 ◽  
Vol 8 (07) ◽  
pp. P07010-P07010 ◽  
Author(s):  
S Ghithan ◽  
S J C do Carmo ◽  
R Ferreira Marques ◽  
F A F Fraga ◽  
H Simões ◽  
...  
Keyword(s):  
Proton Beam ◽  
Aluminum Foil ◽  
Beam Current ◽  
Thin Aluminum ◽  
On Line ◽  
Thin Aluminum Foil

On-line measurement of proton beam current in pA range

2006 ◽  
Vol 249 (1-2) ◽  
pp. 760-763 ◽  
Author(s):  
V. Auzelyte ◽  
F. Andersson ◽  
M. Elfman ◽  
P. Kristiansson ◽  
J. Pallon ◽  
...  
Keyword(s):  
Proton Beam ◽  
Beam Current ◽  
Line Measurement ◽  
On Line

THE PRODUCTION OF 13N2 BY 50-MeV PROTONS FOR USE IN BIOLOGICAL NITROGEN FIXATION

1967 ◽  
Vol 13 (5) ◽  
pp. 587-599 ◽  
Author(s):  
N. E. R. Campbell ◽  
Ram Dular ◽  
H. Lees ◽  
K. G. Standing
Keyword(s):  
Nitrogen Fixation ◽  
Azotobacter Vinelandii ◽  
Continuous Production ◽  
Target Material ◽  
Experimental System ◽  
Beam Current ◽  
Reaction Products ◽  
Arctic Soils ◽  
Number Of Microorganisms ◽  
Biological Nitrogen

An experimental system for the continuous production of radioisotopic nitrogen, 13N2, has been developed using the sector-focused cyclotron at the University of Manitoba. The radioisotope is produced by 50 MeV proton bombardment of 14N2 with powdered melamine as the nitrogen-containing target material. A trap system necessary for the removal of unwanted reaction products is described and details of experimental procedures involving changes in proton beam current and in state of beam focus are presented.Using the radioisotope, a number of microorganisms isolated from sub-Arctic soils of the Fort Churchill region have been examined for their nitrogen fixation potential. Several of these, including a species of Rhodotorula and a species of Pullularia in addition to bacterial forms, have demonstrated nitrogen fixation at a rate comparable with that shown by Azotobacter vinelandii.

scholarly journals Enhanced efficiency of femtosecond laser-driven proton generation from a two-species target with heavy atoms

2016 ◽  
Vol 34 (2) ◽  
pp. 294-298 ◽  
Author(s):  
J. Domański ◽  
J. Badziak ◽  
S. Jabłoński
Keyword(s):  
Proton Beam ◽  
Proton Energy ◽  
High Energy ◽  
Two Dimensional ◽  
Particle In Cell ◽  
Heavy Atoms ◽  
Fs Laser ◽  
The Mean ◽  
Proton Generation ◽  
Mev Protons

AbstractUsing two-dimensional particle-in-cell simulations, the properties of a proton beam generated from a thin erbium hydride target irradiated by a 25 fs laser pulse of intensity ranging from 1020 to 1021 W/cm2 are investigated and compared with the features of a proton beam produced from a hydrocarbon (CH) target. It is shown that in case of using the hydride target the mean proton energy and the number of high-energy (>10 MeV) protons as well as the peak proton pulse intensity can be higher by a factor ~10 than the ones obtained from the CH target.

Kα2 elimination algorithm for Cu, Co and Cr radiations

1983 ◽  
Vol 16 (1) ◽  
pp. 24-27 ◽  
Author(s):  
G. Platbrood
Keyword(s):  
Calculation Method ◽  
Target Material ◽  
X Ray Diffraction ◽  
Acta Cryst ◽  
X Ray ◽  
Signal Noise ◽  
Elimination Algorithm ◽  
Suitable Target ◽  
Noise Ratio

It is well known that the extraneous Kα 2 line complicates the interpretation of X-ray diffraction spectra. Experience has shown that the arms and weights calculated by Ladell's method [Laddell, Parrish & Taylor (1959). Acta Cryst. 12, 561–567] have to be determined for each user's X-ray diffractometer, rather than using the published coefficients, for an accurate Kα 2 elimination. When different materials are analyzed, the signal/noise ratio can be optimized by choosing a suitable target material. Kα 2 correction coefficients have been calculated for Cu, Co and Cr radiations using a fast Fourier calculation method.

scholarly journals Production of the 103Pd via Cyclotron and Preparation of the Brachytherapy Seed

2020 ◽  
Author(s):  
Pooneh Saidi ◽  
Mahdi Sadeghi
Keyword(s):  
Optimum Condition ◽  
Nuclear Reaction ◽  
Experimental Measurement ◽  
Radiochemical Separation ◽  
Beam Current ◽  
Published Data ◽  
Excitation Functions ◽  
Resin Beads ◽  
Data Production ◽  
Mev Protons

This study will briefly explain the production of 103Pd via cyclotron for brachytherapy use. The excitation functions of 103Rh(p,n)103Pd and 103Rh(d,2n)103Pd reactions were calculated using ALICE/91, ALICE/ASH, and TALYS-1.2 codes and compared with published data. Production of 103Pd was done via 103Rh(p,n)103Pd nuclear reaction. The target was bombarded with 18 MeV protons at 200 μA beam current for 15 h. After irradiation and radiochemical separation of the electroplated rhodium target, at the optimum condition, 103Pd was absorbed into Amberlite®IR-93 resin. The preparation of the brachytherapy seed, which is loaded by the resin beads, has also been presented. At least, the method to determine the dosimetric parameters for the seed by experimental measurement has been presented.

Sign in / Sign up

Export Citation Format

Share Document