scholarly journals Diagnostics of discharge channels for neutralized chamber transport in heavy ion fusion

2003 ◽  
Vol 21 (1) ◽  
pp. 13-15 ◽  
Author(s):  
C. NIEMANN ◽  
D. PENACHE ◽  
A. TAUSCHWITZ ◽  
F.B. ROSMEJ ◽  
S. NEFF ◽  
...  
Keyword(s):  
Plasma Diagnostics ◽  
Heavy Ion ◽  
Beam Transport ◽  
Channel Axis ◽  
Accelerator Facility ◽  
Ammonia Gas ◽  
The Past ◽  
Discharge Plasmas ◽  
Preformed Plasma ◽  
Heavy Ion Fusion

The final beam transport in the reactor chamber for heavy ion fusion in preformed plasma channels offers many attractive advantages compared to other transport modes. In the past few years, experiments at the Gesellschaft für Schwerionenforschung (GSI) accelerator facility have addressed the creation and investigation of discharge plasmas, designed for the transport of intense ion beams. Stable, self-standing channels of 50 cm length with currents up to 55 kA were initiated in low-pressure ammonia gas by a CO2-laser pulse along the channel axis before the discharge is triggered. The channels were characterized by several plasma diagnostics including interferometry and spectroscopy. We also present first experiments on laser-guided intersecting discharges.

scholarly journals Heavy-ion production of 77Br and 76Br

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sean R. McGuinness ◽  
John T. Wilkinson ◽  
Graham F. Peaslee
Keyword(s):  
Target Material ◽  
Chemical Separation ◽  
Heavy Ion ◽  
Accelerator Facility ◽  
Promising Alternative ◽  
Ion Production ◽  
Current Production ◽  
The University ◽  
Heavy Ion Fusion ◽  
Fusion Evaporation Reactions

AbstractMany radioisotopes with potential medical applications are difficult to produce routinely, especially those on the proton-rich side of the valley of stability. Current production methods typically use light-ion (protons or deuteron) reactions on materials of similar mass to the target radioisotope, which limits the elemental target material available and may require the use of targets with poor thermal properties (as is the case for the production of radiobromine). These reactions may also create significant amounts of proton-rich decay products which require chemical separation from the desired product in a highly radioactive environment. A promising alternative method using heavy-ion fusion-evaporation reactions for the production of the medically relevant bromine radioisotopes 76Br (t1/2 = 16.2 h) and 77Br (t1/2 = 57.0 h) is presented. Heavy-ion beams of 28Si and 16O were used to bombard natural chromium and copper targets just above the Coulomb barrier at the University of Notre Dame's Nuclear Science Laboratory to produce these bromine and precursor radioisotopes by fusion-evaporation reactions. Production yields for these reactions were measured and compared to PACE4 calculations. In addition to using more robust targets for irradiation, a simple physical–chemical separation method is proposed that will lead to very high radiopurity yields. A summary of accelerator facility requirements needed for routine production of these radioisotopes is also presented.

Intense-heavy-ion-beam transport through an insulator beam guide for heavy ion fusion

1999 ◽  
Author(s):  
Takashi Kikuchi ◽  
Shigeo Kawata ◽  
Shigeru Kato ◽  
Susumu Hanamori ◽  
Masaru Yazawa
Keyword(s):  
Ion Beam ◽  
Heavy Ion ◽  
Beam Transport ◽  
Heavy Ion Beam ◽  
Heavy Ion Fusion

Tests of prototype quadrupole magnets for heavy ion fusion beam transport

2003 ◽  
Vol 13 (2) ◽  
pp. 1508-1511
Author(s):  
C. Gung ◽  
J.V. Minervini ◽  
J.H. Schultz ◽  
R.B. Meinke ◽  
C.L. Goodzeit ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Beam Transport ◽  
Heavy Ion Fusion

scholarly journals New concept on the application of supersonic gas jets for space charge neutralized beam transport in an ICF reactor chamber

1997 ◽  
Vol 15 (2) ◽  
pp. 231-233
Author(s):  
P. Spiller ◽  
V. L. Varentsov
Keyword(s):  
Space Charge ◽  
Plasma Channel ◽  
Ballistic Transport ◽  
Supersonic Jet ◽  
Heavy Ion ◽  
Beam Transport ◽  
Channel Stability ◽  
High Current Discharge ◽  
Gas Expansion ◽  
Heavy Ion Fusion

One of the most crucial problems of a heavy ion fusion (HIF) driver is the transport of the beam from the final focusing system to the fusion target. The conventional focusing scheme is based on ballistic transport, assuming that all space charge effects can be kept sufficiently small. To achieve a space charge neutralized beam transport, other more sophisticated schemes like beam transport in a plasma channel have been suggested. Inspired by the results of the first experiments on the generation of adequate discharge-driven plasmas, we suggest applying a pulsed supersonic gas jet for the high-current discharge channel creation, thereby improving the plasma channel stability. The supersonic jet is produced by a gas expansion into the reactor chamber through a converging-diverging nozzle that has a hollow inner tube on its axis for both heavy ion and UV laser beam injection.

scholarly journals Transport of heavy-ion beams in a 1 m free-standing plasma channel

2006 ◽  
Vol 24 (1) ◽  
pp. 71-80 ◽  
Author(s):  
S. NEFF ◽  
R. KNOBLOCH ◽  
D.H.H. HOFFMANN ◽  
A. TAUSCHWITZ ◽  
S.S. YU
Keyword(s):  
Fusion Reactor ◽  
Ballistic Transport ◽  
Heavy Ion ◽  
Ion Beams ◽  
Beam Transport ◽  
Free Standing ◽  
Plasma Channels ◽  
Channel Transport ◽  
Stable Plasma ◽  
Heavy Ion Fusion

The transport of high-current heavy-ion beams in plasma channels is a promising option for the final transport in a heavy-ion fusion reactor, since it simplifies the construction of the reactor chamber significantly. Our experiments at the Gesellschaft für Schwerionenforschung demonstrate the creation of 1 m long stable plasma channels and the transport of heavy-ion beams. The article outlines the experimental setup used at GSI and reports the results of beam transport measurements using these long channels. The experiments demonstrate good beam transport properties of the channel, indicating that channel transport is a viable alternative to neutralized-ballistic transport.

Laser-guided, intersecting discharge channels for the final beam transport in heavy-ion fusion

2003 ◽  
Vol 93 (12) ◽  
pp. 9470-9476 ◽  
Author(s):  
C. Niemann ◽  
S. Neff ◽  
A. Tauschwitz ◽  
D. Penache ◽  
R. Birkner ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Beam Transport ◽  
Heavy Ion Fusion

scholarly journals Design study of a heavy ion fusion driver, HIBLIC

1985 ◽  
Vol 3 (1) ◽  
pp. 9-27 ◽  
Author(s):  
T. Katayama ◽  
A. Itano ◽  
A. Noda ◽  
M. Takanaka ◽  
S. Yamada ◽  
...  
Keyword(s):  
Power Consumption ◽  
Pulse Duration ◽  
Incident Energy ◽  
Heavy Ion ◽  
Accelerator Complex ◽  
Beam Transport ◽  
Magnet System ◽  
Reduce Power Consumption ◽  
Superconducting Coils ◽  
Heavy Ion Fusion

A heavy ion fusion (HIF) system, named HIBLIC (Heavy Ion Beam and LIthium Curtain) is conceptually designed. The driver system consists of RF linacs (RFQ linacs, IH linacs and Alvarez linacs), storage rings (one accumulator ring and three buncher rings) and beam transport lines with induction beam compressors. This accelerator complex provides 6 beams of 15 GeV208Pb1+ ions to be focused simultaneously on a target. Each beam carries 1·78 kA current with 25 ns pulse duration, i.e., the total incident energy on the target is 4 MJ, 160 TW per shot. Superconducting coils are used in most parts of the magnet system to reduce power consumption.

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