MDM Trouble Report for 2007 Jul 22

Telescope: 2.4m
Observer(s): John Thorstensen (Dartmouth)
Instrument: modspec + echelle CCD

Problem(s) Encountered:
During the heavy rains right after dinner I was out in the dome
filling the dewar, and I noticed a large number of leaks.  The
most problematic one is in the flaring around the dome top
fan that is southwesternmost (with the dome parked); it drips
right onto the telescope!  When I opened a while later, I aimed
the telescope into the far NW before opening the mirror, and 
a fair amount of water dribbled from the vicinity of the top 
ring.  The mirror cover also had large wet spots in the SW
quadrant, which I dried by climbing a ladder (very carefully, 
and accompanied) and using a rag on a stick. I opened the 
mirror cover after I was reasonably certain nothing would drip
on the mirror, and inspection of the mirror showed no water spots.  

The cross-members of the dome shutter collect a lot of water, 
which proceeds to dribble out (through rivet holes?) when you
open the dome. I stopped the dome shutter partway to let these
drain.

Also, during the heavy rain, the wall near the #2 louver
(counting dentist-style from the NW) was weeping water; and 
quite a bit of water was dribbling through the gap between 
the dropout and the shutter, onto the plywood top of the
room that houses the breakers, etc. 

------------------------------

Submitted on 2007 Jul 23 [5:38:53]