scholarly journals Measurement of the Beam Energy Distribution of a Medical Cyclotron with a Multi-Leaf Faraday Cup

Instruments ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 4 ◽  
Author(s):  
Konrad P. Nesteruk ◽  
Luca Ramseyer ◽  
Tommaso S. Carzaniga ◽  
Saverio Braccini
Keyword(s):  
Energy Distribution ◽  
Beam Energy ◽  
University Hospital ◽  
Stopping Power ◽  
Particle Accelerators ◽  
Faraday Cup ◽  
Range Distribution ◽  
Accurate Knowledge ◽  
Thin Aluminum ◽  
Design Construction

Accurate knowledge of the beam energy distribution is crucial for particle accelerators, compact medical cyclotrons for the production of radioisotopes in particular. For this purpose, a compact instrument was developed, based on a multi-leaf Faraday cup made of thin aluminum foils interleaved with plastic absorbers. The protons stopping in the aluminum foils produce a measurable current that is used to determine the range distribution of the proton beam. On the basis of the proton range distribution, the beam energy distribution is assessed by means of stopping-power Monte Carlo simulations. In this paper, we report on the design, construction, and testing of this apparatus, as well as on the first measurements performed with the IBA Cyclone 18-MeV medical cyclotron in operation at the Bern University Hospital.

Time resolved diagnostic of ion beam energy distribution function for plasma thrusters

1997 ◽  
Author(s):  
Christelle Philippe ◽  
Claude Laure ◽  
Andre Bouchoule ◽  
Christelle Philippe ◽  
Claude Laure ◽  
...  
Keyword(s):  
Distribution Function ◽  
Energy Distribution ◽  
Beam Energy ◽  
Ion Beam ◽  
Energy Distribution Function ◽  
Time Resolved ◽  
Plasma Thrusters

scholarly journals Study of the Extracted Beam Energy as a Function of Operational Parameters of a Medical Cyclotron

Instruments ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 63
Author(s):  
Philipp Häffner ◽  
Carolina Belver Aguilar ◽  
Saverio Braccini ◽  
Paola Scampoli ◽  
Pierre Alexandre Thonet
Keyword(s):  
Cross Sections ◽  
Beam Energy ◽  
Reaction Cross ◽  
University Hospital ◽  
Operational Parameters ◽  
Dipole Magnet ◽  
Variable Intensity ◽  
Precise Knowledge ◽  
Positron Emission ◽  
The Magnetic Field

The medical cyclotron at the Bern University Hospital (Inselspital) is used for both routine 18 F production for Positron Emission Tomography (PET) and multidisciplinary research. It provides proton beams of variable intensity at a nominal fixed energy of 18 MeV. Several scientific activities, such as the measurement of nuclear reaction cross-sections or the production of non-conventional radioisotopes for medical applications, require a precise knowledge of the energy of the beam extracted from the accelerator. For this purpose, a study of the beam energy was performed as a function of cyclotron operational parameters, such as the magnetic field in the dipole magnet or the position of the extraction foil. The beam energy was measured at the end of the 6 m long Beam Transfer Line (BTL) by deflecting the accelerated protons by means of a dipole electromagnet and by assessing the deflection angle with a beam profile detector.

COMPLETE AND INCOMPLETE FUSION REACTIONS OF 16O WITH 75As AT INCIDENT ENERGIES BELOW 7 MeV/A

2008 ◽  
Vol 17 (02) ◽  
pp. 407-418
Author(s):  
R. GUIN ◽  
S. K. SAHA
Keyword(s):  
Cross Sections ◽  
Beam Energy ◽  
Theoretical Calculations ◽  
Computer Code ◽  
Incomplete Fusion ◽  
Fusion Reactions ◽  
Range Distribution ◽  
Distribution Studies ◽  
Complete And Incomplete Fusion ◽  
Recoil Range

Excitation functions and differential recoil range distributions in the interaction of 16 O with 75 As have been measured to investigate complete and incomplete fusion reactions. The measured cross sections were compared with theoretical calculations using the computer code ALICE-91. The results indicated predominant incomplete fusion processes in the production of near target products. This was further confirmed by recoil range distribution studies of the products at 104 MeV of beam energy. The relative contributions of complete and incomplete fusion channels are estimated from recoil range distribution measurements.

Surface phonons in thin aluminum oxide films: Thickness, beam-energy, and symmetry-mixing effects

1991 ◽  
Vol 44 (4) ◽  
pp. 1880-1890 ◽  
Author(s):  
B. G. Frederick ◽  
G. Apai ◽  
T. N. Rhodin
Keyword(s):  
Aluminum Oxide ◽  
Beam Energy ◽  
Oxide Films ◽  
Mixing Effects ◽  
Thin Aluminum ◽  
Surface Phonons

Anomalous ion beam scattering by shear Kelvin—Helmholtz wave interactions

1978 ◽  
Vol 20 (3) ◽  
pp. 351-364 ◽  
Author(s):  
J. P. Hauck ◽  
Gregory Benford
Keyword(s):  
Magnetic Field ◽  
Energy Loss ◽  
Beam Energy ◽  
Ion Beam ◽  
Theoretical Estimate ◽  
Stopping Power ◽  
Wave Interactions ◽  
Beam Scattering ◽  
Fast Ion ◽  
The Waves

We inject a fast ion beam across a magnetic field, through a cylindrical 5 cm diameter plasma. Shear Kelvin–Helmholtz waves, already present in the plasma, are considerably amplified. The ion beam is rapidly slowed and scattered. The observed stopping power exceeds the classical power by over two orders of magnitude. A simple theoretical estimate, ascribing beam energy loss to driving of the waves, agrees qualitatively with observations.

Beam-energy distribution measurements of liquid gallium field-ion sources

1983 ◽  
Vol 16 (10) ◽  
pp. L209-L213 ◽  
Author(s):  
G L R Mair ◽  
D C Grindrod ◽  
M S Mousa ◽  
R V Latham
Keyword(s):  
Energy Distribution ◽  
Beam Energy ◽  
Ion Sources ◽  
Liquid Gallium
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