Last results of the continuous-wave high-intensity light ion source at CEA-Saclay

1998 ◽  
Vol 69 (2) ◽  
pp. 1009-1011 ◽  
Author(s):  
R. Gobin ◽  
A. France ◽  
P.-Y. Beauvais ◽  
O. Delferrière ◽  
D. De Menezes ◽  
...  
Keyword(s):  
High Intensity ◽  
Continuous Wave ◽  
Ion Source ◽  
High Intensity Light

Time resolving diagnostic of the compensation process of pulsed ion beams at high-intensity light ion source

2000 ◽  
Vol 71 (2) ◽  
pp. 1107-1109 ◽  
Author(s):  
A. Jakob ◽  
P-Y. Beauvais ◽  
R. Gobin ◽  
H. Klein ◽  
J-L. LeMaire ◽  
...  
Keyword(s):  
High Intensity ◽  
Ion Beams ◽  
Ion Source ◽  
Compensation Process ◽  
High Intensity Light

scholarly journals The feasibility of a noise elimination method using continuous wave response of therapeutic ultrasound signals for ultrasonic monitoring of high-intensity focused ultrasound treatment

2021 ◽  
Author(s):  
Ryo Takagi ◽  
Toshikatsu Washio ◽  
Yoshihiko Koseki
Keyword(s):  
Noise Reduction ◽  
High Intensity ◽  
Focused Ultrasound ◽  
Continuous Wave ◽  
High Intensity Focused Ultrasound ◽  
Hifu Treatment ◽  
Noise Elimination ◽  
Tissue Samples ◽  
Wave Response ◽  
Failure Conditions

Abstract Purpose In this study, the robustness and feasibility of a noise elimination method using continuous wave response of therapeutic ultrasound signals were investigated when tissue samples were moved to simulate the respiration-induced movements of the different organs during actual high-intensity focused ultrasound (HIFU) treatment. In addition to that, the failure conditions of the proposed algorithm were also investigated. Methods The proposed method was applied to cases where tissue samples were moved along both the lateral and axial directions of the HIFU transducer to simulate respiration-induced motions during HIFU treatment, and the noise reduction level was investigated. In this experiment, the speed of movement was increased from 10 to 40 mm/s to simulate the actual movement of the tissue during HIFU exposure, with the intensity and driving frequency of HIFU set to 1.0–5.0 kW/cm2 and 1.67 MHz, respectively. To investigate the failure conditions of the proposed algorithm, the proposed method was applied with the HIFU focus located at the boundary between the phantom and water to easily cause cavitation bubbles. The intensity of HIFU was set to 10 kW/cm2. Results Almost all HIFU noise was constantly able to be eliminated using the proposed method when the phantom was moved along the lateral and axial directions during HIFU exposure. The noise reduction level (PRL in this study) at an intensity of 1.0, 3.0, and 5.0 kW/cm2 was in the range of 28–32, 38–40, and 42–45 dB, respectively. On the other hand, HIFU noise was not basically eliminated during HIFU exposure after applying the proposed method in the case of cavitation generation at the HIFU focus. Conclusions The proposed method can be applicable even if homogeneous tissues or organs move axially or laterally to the direction of HIFU exposure because of breathing. A condition under which the proposed algorithm failed was when instantaneous tissue changes such as cavitation bubble generation occurred in the tissue, at which time the reflected continuous wave response became less steady.

Commissioning of the ECR ion source of the high intensity proton injector of the Facility for Antiproton and Ion Research (FAIR)

2018 ◽  
Vol 89 (5) ◽  
pp. 052303 ◽  
Author(s):  
O. Tuske ◽  
N. Chauvin ◽  
O. Delferriere ◽  
J. Fils ◽  
Y. Gauthier
Keyword(s):  
High Intensity ◽  
Ion Source ◽  
Ecr Ion Source ◽  
Proton Injector
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