Skip to main content
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
/content/aip/journal/rsi/87/11/10.1063/1.4960313
1.
L. R. Grisham, P. Agostinetti, G. Barrera, P. Blatchford, D. Boilson et al., Fusion Eng. Des. 87, 18051815 (2012).
http://dx.doi.org/10.1016/j.fusengdes.2012.08.001
2.
V. Toigo, D. Boilson, T. Bonicelli, R. Piovan, M. Hanada et al., Nucl. Fusion 55(8), 083025 (2015).
http://dx.doi.org/10.1088/0029-5515/55/8/083025
3.
M. Dalla Palma, E. Sartori, P. Blatchford, B. Chuilon, J. Graceffa et al., Fusion Eng. Des. 96, 557562 (2015).
http://dx.doi.org/10.1016/j.fusengdes.2015.06.092
4.
M. Dalla Palma, R. Pasqualotto, E. Sartori, S. Spagnolo, M. Spolaore, and P. Veltri, Rev. Sci. Instrum. 87, 11D417 (2016).
http://dx.doi.org/10.1063/1.4959954
5.
R. Pasqualotto et al., Rev. Sci. Instrum. 83, 02B103 (2012).
http://dx.doi.org/10.1063/1.3662017
6.
A. Panasenkov and V. Smirnov, “Method of measurement of neutral beam profile in the long-pulse powerful injectors,” in 28th SOFT 2014, Book of Abstracts, Paper P4.022, Spain (2014), p. 642.
7.
E. Sartori, P. Veltri, G. Serianni, M. D. Palma, G. Chitarin, and P. Sonato, IEEE Trans. Plasma Sci. 42(3), 633639 (2014).
http://dx.doi.org/10.1109/TPS.2014.2304682
8.
E. W. Thomas, Nucl. Fusion 24, S9 (1984).
http://dx.doi.org/10.1088/0029-5515/24/S1/001
9.
S. Y. Lai et al., Surf. Interface Anal. 8, 93111 (1986).
http://dx.doi.org/10.1002/sia.740080302
10.
P. Riccardi, P. Barone, A. Bonanno, A. Oliva, P. Vetrò et al., Nucl. Instrum. Methods Phys. Res., Sect. B 230, 455459 (2005).
http://dx.doi.org/10.1016/j.nimb.2004.12.083
11.
M. Kaminsky, Atomic and Ionic Impact Phenomena on Metal Surfaces (Springer-Verlag, NY, 1965).
12.
J. Murdock and G. Miller, “Secondary electron emission due to positive ion bombardment,” Technical Report ISC-652, Ames Laboratory, (1955).
13.
R. E. Knop, “Algorithm 381: Random vectors uniform in solid angle,” Commun. ACM 3(5), 326 (1970).
http://dx.doi.org/10.1145/362349.362377
14.
M. A. Furman and M. T. F. Pivi, Phys. Rev. Spec. Top.–Accel. Beams 5, 124404 (2002).
http://dx.doi.org/10.1103/physrevstab.5.124404
15.
E. Sartori, T. J. Maceina, P. Veltri, M. Cavenago, and G. Serianni, Rev. Sci. Instrum. 87(2), 02B917 (2016).
http://dx.doi.org/10.1063/1.4933252
http://aip.metastore.ingenta.com/content/aip/journal/rsi/87/11/10.1063/1.4960313
Loading
/content/aip/journal/rsi/87/11/10.1063/1.4960313
Loading

Data & Media loading...

Loading

Article metrics loading...

/content/aip/journal/rsi/87/11/10.1063/1.4960313
2016-09-06
2016-09-28

Abstract

In high power neutral beams for fusion, beam uniformity is an important figure of merit. Knowing the transverse power profile is essential during the initial phases of beam source operation, such as those expected for the ITER heating neutral beam (HNB) test facility. To measure it a diagnostic technique is proposed, based on the collection of secondary electrons generated by beam-surface and beam-gas interactions, by an array of positively biased collectors placed behind the calorimeter tubes. This measurement showed in the IREK test stand good proportionality to the primary beam current. To investigate the diagnostic performances in different conditions, we developed a numerical model of secondary electron emission, induced by beam particle impact on the copper tubes, and reproducing the cascade of secondary emission caused by successive electron impacts. The model is first validated against IREK measurements. It is then applied to the HNB case, to assess the locality of the measurement, the proportionality to the beam current density, and the influence of beam plasma.

Loading

Full text loading...

/deliver/fulltext/aip/journal/rsi/87/11/1.4960313.html;jsessionid=P8aEbtYEt5uA8wrqIYmrX0Pz.x-aip-live-03?itemId=/content/aip/journal/rsi/87/11/10.1063/1.4960313&mimeType=html&fmt=ahah&containerItemId=content/aip/journal/rsi
true
true

Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
/content/realmedia?fmt=ahah&adPositionList=
&advertTargetUrl=//oascentral.aip.org/RealMedia/ads/&sitePageValue=rsi.aip.org/87/11/10.1063/1.4960313&pageURL=http://scitation.aip.org/content/aip/journal/rsi/87/11/10.1063/1.4960313'
Right1,Right2,Right3,