X-ray sources of medical linear accelerators: Focal and extra-focal radiation

1993 ◽  
Vol 20 (5) ◽  
pp. 1417-1427 ◽  
Author(s):  
D. A. Jaffray ◽  
J. J. Battista ◽  
A. Fenster ◽  
P. Munro
Keyword(s):  
Linear Accelerators ◽  
X Ray ◽  
Medical Linear Accelerators

scholarly journals Synchrotron X-ray induced acoustic imaging

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seongwook Choi ◽  
Eun-Yeong Park ◽  
Sinyoung Park ◽  
Jong Hyun Kim ◽  
Chulhong Kim
Keyword(s):  
Acoustic Imaging ◽  
Signal Frequency ◽  
X Rays ◽  
Repetition Period ◽  
Linear Accelerators ◽  
X Ray ◽  
X Ray Computed ◽  
Medical Linear Accelerators ◽  
Ionizing Radiation Exposure ◽  
X Ray Absorption

AbstractX-ray induced acoustic imaging (XAI) is an emerging biomedical imaging technique that can visualize X-ray absorption contrast at ultrasound resolution with less ionizing radiation exposure than conventional X-ray computed tomography. So far, medical linear accelerators or industrial portable X-ray tubes have been explored as X-ray excitation sources for XAI. Here, we demonstrate the first feasible synchrotron XAI (sXAI). The synchrotron generates X-rays, with a dominant energy of 4 to 30 keV, a pulse-width of 30 ps, a pulse-repetition period of 2 ns, and a bunch-repetition period of 940 ns. The X-ray induced acoustic (XA) signals are processed in the Fourier domain by matching the signal frequency with the bunch-repetition frequency. We successfully obtained two-dimensional XA images of various lead targets. This novel sXAI tool could complement conventional synchrotron applications.

scholarly journals Few-Cycle Infrared Pulse Evolving in FEL Oscillators and Its Application to High-Harmonic Generation for Attosecond Ultraviolet and X-ray Pulses

Atoms ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Ryoichi Hajima
Keyword(s):  
Harmonic Generation ◽  
Short Pulse ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Pulse Generation ◽  
Solid State Lasers ◽  
Linear Accelerators ◽  
X Ray ◽  
Ultrafast Science ◽  
Historical Remarks

Generation of few-cycle optical pulses in free-electron laser (FEL) oscillators has been experimentally demonstrated in FEL facilities based on normal-conducting and superconducting linear accelerators. Analytical and numerical studies have revealed that the few-cycle FEL lasing can be explained in the frame of superradiance, cooperative emission from self-bunched systems. In the present paper, we review historical remarks of superradiance FEL experiments in short-pulse FEL oscillators with emphasis on the few-cycle pulse generation and discuss the application of the few-cycle FEL pulses to the scheme of FEL-HHG, utilization of infrared FEL pulses to drive high-harmonic generation (HHG) from gas and solid targets. The FEL-HHG enables one to explore ultrafast science with attosecond ultraviolet and X-ray pulses with a MHz repetition rate, which is difficult with HHG driven by solid-state lasers. A research program has been launched to develop technologies for the FEL-HHG and to conduct a proof-of-concept experiment of FEL-HHG.

Some folded issues related to over-shielded and unplanned rooms for medical linear accelerators - A case study

2015 ◽  
Vol 67 (3) ◽  
pp. 599-607
Author(s):  
Wazir Muhammad ◽  
Asad Ullah ◽  
Amjad Hussain ◽  
Nawab Ali ◽  
Khan Alam ◽  
...  
Keyword(s):  
Linear Accelerators ◽  
Medical Linear Accelerators

A Model for Pre-emptive Maintenance of Medical Linear Accelerators: Predictive Maintenance

2014 ◽  
Vol 90 (1) ◽  
pp. S738
Author(s):  
C.M. Able ◽  
A.H. Baydush ◽  
C. Nguyen ◽  
J. Gersh ◽  
A. Ndlovu ◽  
...  
Keyword(s):  
Predictive Maintenance ◽  
Linear Accelerators ◽  
Medical Linear Accelerators

SU-E-T-270: Optimized Shielding Calculations for Medical Linear Accelerators (LINACs)

2012 ◽  
Vol 39 (6Part14) ◽  
pp. 3765-3765 ◽  
Author(s):  
W Muhammad ◽  
S Lee ◽  
A Hussain
Keyword(s):  
Linear Accelerators ◽  
Medical Linear Accelerators

Measurements in high-intensity beams from medical linear accelerators

1987 ◽  
Vol 14 (6) ◽  
pp. 1067-1070 ◽  
Author(s):  
P. F. O'Brien ◽  
R. B. Barnett ◽  
H. B. Michaels ◽  
R. A. Siwek
Keyword(s):  
High Intensity ◽  
Linear Accelerators ◽  
Medical Linear Accelerators
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