Performance of the ASTERIX III high power iodine laser
For more than 500 shots the 1 TW iodine laser Asterix III has demonstrated high reliability for light-plasma-interaction experiments. Improved laser parameters and new measurements of light pulse properties are reported.
Asterix IV iodine laser at MPQ Garching
The Asterix IV high power iodine laser is designed to deliver in a single beam output pulses with lengths ranges from 0.1 to 4 ns with a maximum power of 5 TW and an energy of up to 2 kJ. This laser has now achieved its projected output energy of 2.0 kJ and an output power of 4 TW. The Asterix laser has been developed on the basis of 10 years of experience with the 1 TW Asterix III laser and with the support of a 1D and a 3D pulse propagation code. Special emphasis has been put on obtaining an optimal overall efficiency of the laser system and a laser beam intensity profile as homogeneous as possible.
The incidence of dead and dying fish in the Moray Firth, September 1963
Dead and dying fish were reported from the Moray Firth during a period of 15 days in September 1963. The initial mortalities were in the inner Firth, but they later spread outwards, especially eastwards along the southern shores of the Firth. Mass mortalities of the lugworm (Arenicola marina) also occurred in Scottish waters in 1962 and 1963, and at Balintorein Easter Ross fish and lugworm mortalities were contemporary.