IOPscience

Journal of Instrumentation

Quick search Find article
Quick search
Find article
Journal of Instrumentation Volume 1 September 2006 Create an alert RSS this journal

J E McDonald et al 2006 JINST 1 P09003 doi:10.1088/1748-0221/1/09/P09003

In beam tests of implanted helium targets

J E McDonald 1, R H France III2, R A Jarvis3, M W Ahmed4, M A Blackston4, Th Delbar5, M Gai3,6, T J Kading3, Y Parpottas4, B A Perdue4, R M Prior7, D F Rubin6, M C Spraker7, J D Yeomans1, L Weissman3, H R Weller4 and E L Wilds Jr3

Show affiliations

Tag this article Full text PDF (206 KB)

Abstract References
Targets of 3,4He implanted into thin aluminum foils (approximately 100, 200 or 600 μg/cm2) were prepared using intense helium beams at low energy (20, 40 or 100 keV). Uniformity was achieved by a beam raster across a tantalum collimator at the rates of 0.1 Hz (vertical) and 1 Hz (horizontal). Helium implantation into the very thin (80-100 μg/cm2) aluminum foils failed to produce useful targets due to an under estimation of the range by SRIM code. The range in aluminum predicted by Northcliffe and Shilling and the NIST online tabulation, on the other hand, over estimate this range. An attempt to implant a second layer was also carried out, but did not significantly increase the helium content beyond the blistering limit. Rutherford Back Scattering of 1.0 and 2.5 MeV proton beams and recoil helium from 15.0 MeV oxygen beams were used to study the helium content and profile. The helium content and profile were very stable even after a prolonged bombardment (two days) with moderately intense beams of 16O or 4He. Helium implanted into thin foils is a good choice, for example, for a measurement of the 3He(α,γ)7Be reaction and the associated S34 astrophysical cross section factor (S-factor).

Keywords

Accelerator modelling and simulations (multi-particle dynamics; single-particle dynamics)

Targets (spallation source targets, radioisotope production, neutrino and muon sources)

 

E-print Number: nucl-ex/0608027

Cited: by |

Refers: to

PACS

25.55.-e 3H-, 3He-, and 4He-induced reactions

29.25.Lg Ion sources: polarized

23.20.Lv gamma transitions and level energies

27.10.+h A(less-than-or-equal-to)5

29.25.Pj Polarized and other targets

Subjects

Accelerators, beams and electromagnetism

Instrumentation and measurement

Nuclear physics

Particle physics and field theory

Dates

Issue 09 (September 2006)

Received 22 August 2006, accepted for publication 27 August 2006

Published 15 September 2006



Your last 10 viewed
  1. In beam tests of implanted helium targets

    J E McDonald et al 2006 JINST 1 P09003

  2. Application of XFEL to the measurement of x-ray flux irradiating bio-molecules by using x-ray emission from hollow atoms produced from multiple x-ray absorption

    Kengo Moribayashi 2008 J. Phys. B: At. Mol. Opt. Phys. 41 085602

  3. Antisymmetric-tensor and electromagnetic effects in an α'-non-perturbative four-dimensional string cosmology

    Jean Alexandre et al 2008 New J. Phys. 10 033033

  4. Watching worlds collide: effects on the CMB from cosmological bubble collisions

    Spencer Chang et al JCAP04(2009)025

  5. Integrable hamiltonian for classical strings on AdS5 × S5

    Gleb Arutyunov and Sergey Frolov JHEP02(2005)059

  6. Distributed p–n nano-interfaces

    H Han et al 2008 J. Phys. D: Appl. Phys. 41 065305

  7. Hořava-Lifshitz f(R) gravity

    J. Klusoň JHEP11(2009)078

  8. From big bang to big crunch and beyond

    Shmuel Elitzur et al JHEP06(2002)017

  9. Experimental study of the electromagnetic component of drift-wave turbulence

    K Rahbarnia et al 2008 Plasma Phys. Control. Fusion 50 085008

  10. Matrix model and β-deformed Script N = 4 SYM

    G.C. Rossi et al JHEP12(2009)043

Share

View by subject




Export






Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.