Laser spot size and beam profile studies for tissue welding applications

1999 ◽  
Author(s):  
Nathaniel M. Fried ◽  
Vincent C. Hung ◽  
Joseph T. Walsh, Jr.
Keyword(s):  
Spot Size ◽  
Beam Profile ◽  
Laser Spot ◽  
Laser Spot Size ◽  
Tissue Welding

Modelling of the laser spot size dependence of retinal thermal damage

2005 ◽  
Author(s):  
Karl Schulmeister ◽  
Bernhard Seiser ◽  
Florian Edthofer ◽  
David J. Lund
Keyword(s):  
Size Dependence ◽  
Thermal Damage ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size

scholarly journals Long lifetime of bialkali photocathodes operating in high gradient superconducting radio frequency gun

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. Wang ◽  
V. N. Litvinenko ◽  
I. Pinayev ◽  
M. Gaowei ◽  
J. Skaritka ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Electron Beams ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size ◽  
High Quantum Efficiency ◽  
High Brightness ◽  
High Charge ◽  
Superconducting Radio Frequency ◽  
Long Lifetime

AbstractHigh brightness, high charge electron beams are critical for a number of advanced accelerator applications. The initial emittance of the electron beam, which is determined by the mean transverse energy (MTE) and laser spot size, is one of the most important parameters determining the beam quality. The bialkali photocathodes illuminated by a visible laser have the advantages of high quantum efficiency (QE) and low MTE. Furthermore, Superconducting Radio Frequency (SRF) guns can operate in the continuous wave (CW) mode at high accelerating gradients, e.g. with significant reduction of the laser spot size at the photocathode. Combining the bialkali photocathode with the SRF gun enables generation of high charge, high brightness, and possibly high average current electron beams. However, integrating the high QE semiconductor photocathode into the SRF guns has been challenging. In this article, we report on the development of bialkali photocathodes for successful operation in the SRF gun with months-long lifetime while delivering CW beams with nano-coulomb charge per bunch. This achievement opens a new era for high charge, high brightness CW electron beams.

Laser spot size and scaling laws for laser beam additive manufacturing

2022 ◽  
Vol 73 ◽  
pp. 26-39
Author(s):  
Jordan S. Weaver ◽  
Jarred C. Heigel ◽  
Brandon M. Lane
Keyword(s):  
Additive Manufacturing ◽  
Laser Beam ◽  
Scaling Laws ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size

Effect of laser spot size on energy balance in laser induced plasmas

1980 ◽  
Vol 51 (11) ◽  
pp. 6030-6032 ◽  
Author(s):  
H. C. Pant ◽  
S. Sharma ◽  
D. D. Bhawalkar
Keyword(s):  
Energy Balance ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size

Effect of Axial Length on Laser Spot Size During Photodynamic Therapy: An Experimental Study in Monkeys

2006 ◽  
Vol 141 (1) ◽  
pp. 214-215 ◽  
Author(s):  
Mineo Kondo ◽  
Yasuki Ito ◽  
Kentaro Miyata ◽  
Nagako Kondo ◽  
Kohei Ishikawa ◽  
...  
Keyword(s):  
Experimental Study ◽  
Photodynamic Therapy ◽  
Axial Length ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size
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