GASEOUS ION LASER RESEARCH.
Interim engineering rept. no. 4, 1 Apr-30 Jun 66,
HUGHES RESEARCH LABS MALIBU CA
Pagination or Media Count:
Results of the experiments on gas pumping in argon ion lasers are given along with the development of a theory which extends the earlier work of Langmuir and Druyvesteryn. Agreement between experiment and theory is quite good and points up the need for an adequate gas return path conductance. Measurements of spontaneous emission intensity for several lines connected to the upper levels of the 4880 A and 5145 A transitions are given. These measurements show that the upper levels have a significant fraction of their population 14 supplied by radiative cascade from higher lying levels. The effects of this result on the existing two-collision excitation theory are discussed. While the cascade mechanism is seen not to violate the two-collision mechanism, it does introduce an additional uncertainty into the path of the excitation process. The deleterious effect of gas pumping on spontaneous sidelight measurement is discussed and offered as an explanation for the inconsistent results observed in he variations of sidelight with magnetic field observed previously. Progress on the segmented metal bore experimants to investigate throat heating phenomena is given. A new design is being used to speed the data acquisition. The rf excited ring laser experimental station is now completed and is described.
- Lasers and Masers