Alcator C-MOD   
			    Weekly Highlight Report  
				October 14, 1993

Plasma operation continues as scheduled on Alcator C-MOD. This is the fifth
run week of the current operating period. We are continuing to operate with
"reverse" field and current, i.e. with the ion grad-B drift toward the lower
x-point. 

We have continued to extend the parameter range of Alcator C-MOD, and have now
increased the plasma current to 1MA. Confinement data was obtained on a series
of 1MA single null divertor discharges. High current disruptions with
current-quench rates in the range of 0.5MA/msec were observed. 

The 50GHz reflectometer is now operational and taking data. Density evolution
during the breakdown and startup phase and edge fluctuations during the later
discharge are observed. 

Modulated gas puffing experiments were carried out as part of a study of
particle transport in divertor plasmas. Experiments were carried out in
conjunction with pellet injection and during current ramp-downs to investigate
the origin of observed changes in gross particle confinement. 

Using the built-in "capillary" tube gas feed lines in the lower divertor
region, we have begun divertor gas-puffing experiments. We have injected
deuterium and argon into the private flux region below the x-point and
observed increases in radiated power in the divertor.  These experiments in
ohmic plasmas will provide early data in support of our dissipative divertor
studies. Fueling of the main plasma through the divertor has also been done. 

The flywheel, which will be installed following the Phase I operating
campaign, has been loaded on a railcar for transport from New York to Boston.