ISA meeting
Status of the ring: The ring has been running
well during the past week. We routinely have
currents around 170 mA with good lifetime.
Monday evening the microtron 'died', and we
did not manage to bring it back to life until
Tuesday at 11:30. The cause of the breakdown
is unknown.
Beam during the Easter vacation: It is planned to provide beam for the users every day during Easter. In the period from 27 to 30/3, there
will be at least one injection per day, at 10:30,
with a possible second injection at 16:30.
We do not plan to provide beam on Monday
31/3, unless requested by the users.
Changes to this plan will be posted on the
screens in the ring hall.
The undulator: Last Monday morning was
spent on the undulator, and we are happy to
report, that it seems to work as expected: We
saw a lot of light. The light was observed at a
position about 8½ m away from the undulator,
and it was about 1.5 cm off horizontally. It
could be centered with the correction dipoles,
so now we must find a setting of the correction
dipoles which centers the beam in the undulator
beamline AND maintains beam positions for
the other users. An alternative is to turn the undulator beamline 1.8 mrad. We will use next
Tuesday (April 1st) morning to investigate this
further, so there will be no beam for the users
until Tuesday at noon.
Unfortunately, there was a leak in a window on
the undulator beamline, which raised the vacuum to about 10-8 torr. The window is being
replaced, and bakeout will start before Easter.
The new control system is performing well - when it is performing. We have seen strange errors, which point to a hardware fault in the computer we use. It will be replaced as soon as possible.
25/3 1997 / NH