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3 edition of Optimisation calculations for slow neutron production with the 136 MeV Harwell electron linac found in the catalog.

Optimisation calculations for slow neutron production with the 136 MeV Harwell electron linac

J. Needham

Optimisation calculations for slow neutron production with the 136 MeV Harwell electron linac

by J. Needham

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Published by Atomic Energy Research Establishment, Materials Physics Division, [available from H.M.S.O.] in Harwell, [London] .
Written in English


Edition Notes

Statement[by] J.Needham [and] R. N. Sinclair.
SeriesAERE-R 9229, MPD/NBS/103
ContributionsSinclair, R N., Atomic Energy Research Establishment. Materials Physics Division.
The Physical Object
Pagination14p., (5)p. of plates :
Number of Pages14
ID Numbers
Open LibraryOL15114464M
ISBN 10070580660X
OCLC/WorldCa35353383

Linac and a storage ring. The klystron-modulator(K&M) system of PLS Linac had been supplying high power microwaves for the acceleration of 2 GeV electron beams from to A GeV full energy electron injection has been launched since on October The GeV full energy electron beam from the linac is. For travelling wave section another quantity can be used to calculate the breakdown performance, the scaled power. It is defined as: 𝑃 = 𝑃 𝛼 𝐶 where P is the power, t the pulse length, αis a material dependent exponent (1/3 for copper); C the iris circumference and it not .

SIMULATIONS OF ION BEAM LOSS IN RF LINACS WITH EMPHASIS ON TAILS OF PARTICLE DISTRIBUTIONS B. Bazak 1,2, A. Shor 1,*, D. Berkovits 1, G. Feinberg 1,2, I. Mardor 1, J. Rodnizki 1, Y. Yanay 1,**, 1Soreq Nuclear Research Center, Yavne , Israel, 2Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem , Israel Abstract We present a new approach for beam loss calculationsFile Size: KB. A Monte Carlo method to model the neutron production and shielding at a proton therapy facility is described here. Titt U., Newhauser W.D., Yan X., Dexheimer D.T. () Neutron Shielding Calculations for a MeV Proton Therapy Facility. In: Kling A., Baräo F.J.C., Nakagawa M., Távora L., Vaz P. (eds) Advanced Monte Carlo for Radiation Author: U. Titt, W. D. Newhauser, X. Yan, D. T. Dexheimer.

  A detailed description of neutron production by the1H(t, n)3He source reaction is given. The corresponding angular-dependent yields and spectra are calculated for an incident triton energy of 21 MeV and a thick (totally absorbing) hydrogen target. Since this reaction is proposed for alternative consideration to present concepts of d-lithium fusion materials test facilities, the angular and Cited by: 4.   A method for the analysis of L steel drums filled with various amounts of concrete and polyethylene by large sample cyclic neutron activation analysis (LS-CNAA) using a pulsed 14 MeV neutron source was developed. The elemental composition obtained for the homogenous samples was found to agree well with the expected values, the differences lying between −3 and +15%.Cited by: 1.


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Optimisation calculations for slow neutron production with the 136 MeV Harwell electron linac by J. Needham Download PDF EPUB FB2

Optimisation calculations for slow neutron production with the MeV Harwell electron linac. By J Needham and R N Sinclair. Topics: Computing and Computers. Year: OAI identifier: oai: Provided by: CERN Author: J Needham and R N Sinclair. By removing the flattening filter in the Linac head and considering only photons with energy above the photo-neutron production threshold (> MeV for lead) an increment of a factor can be obtained.

Moreover, the increase of the primary electron energy up to 20 MeV brings a further gain factor in the “useful” photon by: 7. Optimization Study on Production of Mo Using High Power Electron Accelerator Linac Author: A.

Taghibi Khotbeh-Sara, F. Rahmani [KNTU, Tehran, Iran] S. Ahmadiannamin [ILSF, Tehran, Iran] F. Ghasemi [NSTRI, Tehran, Iran] Subject: 08 Applications of Accelerators, Technology Transfer and Industrial Relations/U07 Industrial Applications KeywordsFile Size: KB.

Intense, pulsed beams of low‐energy positrons have been produced by a high‐energy beam from an electron linac. The production mechanism has been studied near ‐MeV incident energy and several characteristics that affect slow‐positron production have been identified.

These characteristics include the geometry of the electron‐positron converter and positron moderator, the thickness Cited by: electron linac for the pulsed neutron source as one of the. long-term nuclear R&D programs at the Korea Atomic. Energy Research Institute.

The linac has two operating. modes; one for short pulse mode with the various. repetitions between 2 ns and ns and the other for long. pulse mode with 1 µs. Optimisation of linear accelerator performance for single-pass free-electron laser operation Evelyne Meier The Linac CoherentLight Source 41 The [email protected] Linac 45 i.

Calculation of the relative peak current deviation dIBC1/IBC1 at. ENERGY COMPRESSINGSYSTE MFO R THE MeV ELECTRON LINAC A. Dovbnya, N. Shevchenkov, and V. Shendrik Institute of Physics and Technology, the Ukrainian Academy of Sciences, KharkovUSSR Abstract Results presented are of the calculations and an experimental investigation of the beam energy.

Final electron energy of PLS linac is 2 GeV. The linac has been operated as a full energy injector for the PLS since December Annual operation hour of the system is about 6,hours. Since the commissioning of the PLS linac, the high voltage run time of an oldest unit among the 12 systems has been accumulated ohours as of.

Performance of the Magnetron H Source on the BNL MeV Linac * James G. Alessi Brookhaven National Laboratory Upton, NY, USA Abstract. A magnetron surface plasma H" ion source has been used at Brookhaven since for injection into the MeV linac.

Sincethis source has operated with a circular aperture, injecting into an RFQ. The Harwell 30 MeV electron linear accelerator has been modified to provide electron bursts of 10 nsec duration at a repetition rate of p.p.s. and peak current A. A neutron time-of-flight spectrometer has been set up to cover the neutron energy range from MeV up to ∼ 15 by: The MCNP5 code (X-5 Monte Carlo Team, ) was used to design a simple model of a linac head being a 10 cm-thick spherical shell of tungsten with 15 cm-inner radius ().In the center, a source of monoenergetic electrons was sited, to 6 cm below the source a tungsten scattering foil (1 cm-diameter and mm-thick) was : Tzinnia Gabriela Soto-Bernal, Antonio Baltazar-Raigosa, Diego Medina-Castro, Hector Rene Vega-Carril.

OPTIMIZATION OF DUAL SCATTERING FOIL FOR 6 TO 20 MeV ELECTRON BEAM RADIOTHERAPY B.J. Patil, V.N. Bhoraskar, S.D. Dhole, Department of Physics, Universityof Pune, Pune - S.T. Chavan, S.N. Pethe, R. Krishnan, SAMEER, IIT Powai Campus, Mumbai - Abstract From last 50 years, electron beam therapyhas an impor-tant radiation therapy File Size: KB.

An experimental neutron facility based on 32 MeV/ kW electron linac has been studied by means of PARMELA simulation code. Beam dynamics study for a traveling wave constant gradient electron accelerator is carried out to reach the preferential operation parameters (E = 30 MeV, P = 18 kW, dE/E Cited by: 2.

Intense slow positron beams have been produced using an 18 MeV electron linac. A NaI(Tl) detector with well-known detection efficiency has been used to measure the keV annihilation γ-rays. Slow positrons detected are about × 10 5 per second at μA electron Cited by: 4.

An experimental neutron facility based on 32 MeV/ kW electron linac has been studied by means of PARMELA simulation code. Beam dynamics study for a traveling wave constant gradient electron accelerator is carried out to reach the preferential operation parameters (E = 30 MeV, P = 18 kW, dE/E linac comprises mainly E-gun, pre-buncher, buncher, and 2 Cited by: 2.

The Spallation Neutron Source (SNS) is an accelerator-based neutron sour ce being built at Oak Ridge National Laboratory. A conventional MHz drift-tube linac (DTL) accelerates the H.

beam from to 86 MeV, followed by a MHz coupled-cavity linac (CCL) to MeV. Figure 12 shows the data of Sinclair and Day3' and of Barber and George,jz cited by C i e r j a ~ k swhich compares well with the calculations.

The highest-power,~~ electron-linac-driven neutron sources operate on this plateau using compact, heavy-element targets, the accelerators delivering about 50 kW with energies above about 50 MeV. The Cited by: proposes to construct a megawatt-class electron linear accelerator (e-linac) as a driver for radioactive beam production for nuclear structure and astrophysics [1] and material science.

The design strategy, including upgrade path, for this cost-effective facility is elaborated. The 50 MeV, 10 mA, c.w. linac is based on TTF superconducting. Measurements were performed at several positions within the treatment room and maze with the linac jaws closed to maximize neutron production.

Results: The measurements showed a total fluence reduction between 35‐40% in the room and maze when the flattening filter was : R Maglieri, L Liang, M Evans, A Licea, J Dubeau, S Witharana, F DeBlois, J Seuntjens, J Kildea. This paper reports the measured neutron production from a Mobetron mobile electron linac, operated at 12 MeV, and compares the results with those from a conventional linac, also operated at 12 MeV.

An activation technique, using the reactions 31P(n, gamma)32P (thermal neutrons) and 31P(n, p)31Si (fast neutrons, E greater than MeV), has been developed to measure fast- and thermal-neutron.Study of a 5MeV electron linac based neutron source February Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (1)We plan to use our X-band electron linac (GHz, 30 MeV) [1] as a linac based neutron source [2,3] for th e nuclear data study for the Fukushima nuclear plant accident.