Alcator C-MOD Weekly Highlights
				July 7, 1994


The maintenance and repair period is continuing. The main effort this week is
devoted to machine disassembly. 

By Tuesday morning, the structure had warmed sufficiently to begin removing
the cryostat. The cryostat has now been removed, allowing access to the
cylinder and the domes, and to the external curved bus and coax feedthroughs. 

Following the in-vessel survey, manned access was performed to disconnect and
remove cabling and internal hardware which was connected to the vertical ports
or horizontal port extensions. All the extensions will be removed in order to
remove the cylinder. 

All of the vertical port hardware on top and bottom, including the crosses and
the tear-drop transition flanges have now been removed. Cabling which had been
connected to the flanges has been either pulled up into the port or gathered
into bundles and bagged so they fit through the openings in the domes. The
pumping station has been disconnected and pulled back. All but two of the
horizontal port extensions have now been removed. 

The upper dome was unbolted from the cylinder on Wednesday and the lifting jig
moved into position over the machine. The upper dome has now been lifted off
the machine and relocated to the northeast corner of the cell. Removing the
dome provides access to the upper TF magnet arms and top of the central
column. 

A shipment of eleven X-terminals for the control room has been received.
These will be used to replace our old Vaxstation 2000s, most of which will be
retired. 

Drs. Snipes and Golovato have returned from the EPS meeting in Montpelier. Ian
Hutchinson is back at JET for the last month of his sabbatical. The three
Alcator C-MOD presentations at EPS, consisting of an overview by Hutchinson
(invited talk) and posters on ICRF and H-mode results by Golovato and Snipes,
respectively, were all well-received. The Alcator H-mode data was also
included in a report by Ryter on the ITER H-mode threshold database; Ryter
noted that the C-MOD results significantly extend the database toward the
regimes anticipated for ITER, in terms of field, density and surface power
density. The C-MOD divertor results were also referred to favorably by several
participants. Following the EPS meeting, Dr. Golovato visited FTU (Frascati)
where he presented a talk on Alcator C-MOD results, and also visited JET,
where he discussed the ICRF results with Drs. Jacquinot and Gormezano.