Coherent Radiation Sources in the Millimeter and Submillimeter Wave Region: Basic Principles and Recent Developments

Author(s):  
N.C. Luhmann
2007 ◽  
Vol 22 (22) ◽  
pp. 3838-3851 ◽  
Author(s):  
R. A. KISHEK ◽  
G. BAI ◽  
S. BERNAL ◽  
D. FELDMAN ◽  
T. F. GODLOVE ◽  
...  

New coherent radiation sources in the hard X-ray and Terahertz regimes promise exciting new developments in science, as previously dark areas of the spectrum are brightly illuminated. Ultra-short, ultra-bright radiation packets can probe the structure of matter, and image chemical and biological processes well beyond the present state of the art. Production of this coherent radiation, however, places an unprecedented challenge on the production and acceleration of high-quality electron beams. To deliver a nano-Coulomb of charge with an emittance of less than one micron, while transporting the beam through long sections of acceleration and compression, is the prerequisite for unlocking the gates of this promising new science. Using a low-energy electron storage ring, we deliberately enhance the space charge force while slowing down the time-scale to easily measurable levels so as to maximize our understanding of the particle dynamics necessary for producing bright beams.


1998 ◽  
Vol 177-181 ◽  
pp. 1373-1374 ◽  
Author(s):  
S. Okubo ◽  
S. Kimura ◽  
H. Ohta ◽  
M. Itoh

1993 ◽  
Vol 62 (2) ◽  
pp. 785-792 ◽  
Author(s):  
Hitoshi Ohta ◽  
Nobuyasu Yamauchi ◽  
Takao Nanba ◽  
Mitsuhiro Motokawa ◽  
Shuichi Kawamata ◽  
...  

2003 ◽  
Vol 2 (12) ◽  
pp. 1303 ◽  
Author(s):  
Akio Kishigami ◽  
Masatoshi Itoh ◽  
Tatsuo Nozokido ◽  
Hiroaki Minamide ◽  
Yasuo Tsukahara ◽  
...  

1996 ◽  
Vol 173 ◽  
pp. 137-142
Author(s):  
Peter Schneider

I will review the basic principles and some of the most recent developments of parameter-free reconstructions of cluster mass profiles from the distortions of background galaxy images.


Author(s):  
Nolan Stelter ◽  
Arnav Das ◽  
Zahra Hanifah ◽  
Rizwan Uddin

Due to misconceptions surrounding radiation and nuclear energy, educating the general public about basic radiation concepts has become increasingly important. The Virtual Education and Research Laboratory (VERL) at the University of Illinois at Urbana-Champaign (UIUC) has developed a 3D, virtual, interactive game that conveys the physics of radiation and principles of radiation protection to the player. The model is a scavenger hunt style game that takes place in a virtual model of a TRIGA research reactor. Several virtual radiation sources are placed in the 3D virtual model of the TRIGA facility. Radiation drops away from the radiation source. The effect of shielding can also be incorporated in modeling the radiation transport, leading to realistic radiation fields. The user’s goal is to find and collect (virtual) objects placed in this facility while minimizing the dose received in doing so. The player is meant to learn about time, distance, and shielding — key concepts in radiation protection. The start screen displays the radiation field in the form of a colored coded floor, as well as the location of the desired objects. With the given information, the player is encouraged to plan the route to collect the items and minimize exposure. By repeatedly playing the game, the player becomes familiar with the layout of the facility, and of the location of the radiation sources. This educational game is a useful teaching tool. Those unfamiliar with radiation protection concepts are able to understand how important time, distance, and shielding are in minimizing dosage. Additionally, this game proves to be a useful engagement and outreach tool. Upon completion of the game, the user is shown the score, the dose received, as well as a list of dose received in well-known instances such as eating a banana or in getting an x-ray at the dentist’s office. The dose minimization game developed earlier for computers has now been developed for use as a game-app for cell phones. These recent developments allow for wider outreach, further increasing the use of the model as an outreach and educational tool.


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