31 May 2017
ISOLDE Physics Group Meeting 31/05/2017
This
weeks
meeting
took
place
in
508
to
avoid
the
noise
and
take
advantage
of
the
air
conditioning.
Technical news
• GPS
– GPS
target
was
not
in
good
condition
on
the
offline
separator
and
is
not
ready
for
physics.
– #513
backup
target
was
used
in
its
place
and
the
B
beams
worked
very
nicely.
Users
satisfied
with
the
yields.
– 60
kV
was
not
possible
on
the
target
due,
probably,
to
leaking
dehumidifier.
– Run
was
performed
with
30
kV
instead,
although
not
perfect
was
acceptable
for
IDS
run.
– There
was
a
leak
of
SF6
gas
somewhere
in
the
line
as
the
bottle
went
from
2.0
bar
to
0.2
bar
in
2
days.
This
has
to
be
improved
and
is
being
worked
on.
– At
some
point,
the
target
anode
went
to
OFF
status
but
went
to
white
and
not
red
on
the
control
screens.
– Full
trip
of
target
HV
also
occurred,
but
control
screens
were
frozen
and
still
showed
everything
as
green.
It
was
finally
resolved
manually.
• HRS
– COLLAPS
target
online
on
Monday,
setup
on
Tuesday.
– The
beam
tuning
looked
a
little
strange,
tuning
continued
overnight.
o In
retrospect:
most
likely
due
to
a
disconnected
power
supply
at
the
HRS
front
end.
This
was
only
discovered
w/b
19th
June.
– The
picoammeter
on
FC490
was
exchanged,
but
there
are
still
problems.
• RILIS
– Al
setup
is
ready
and
available.
• Technical stop
– Technical
stop
went
well
and
there
was
not
disruption
to
the
users.
– Access
to
the
dehumidifier
at
GPS
was
the
biggest
intervention.
• REX/HIE
– ToF
issues
because
pulsed
electrodes
have
strange
configuration.
– Alignment
and
smoothing
measurements
due
to
be
completed
on
Thursday.
Data
will
be
analysed
to
see
if
further
intervention
is
required.
– ISS
magnet
stand
to
arrive
next
week
and
surveying
and
drilling
of
holes
to
be
completed.
Magnet
to
be
put
in
place
w/b
12th
June.
– XT03
crane
will
be
installed
at
the
end
of
the
week.
Physics news
• IDS
– 8B
decay
experiment
looking
at
breakup
into
α
particles
and
possible
p+
decay.
– Particle
spectroscopy
setup
was
used
with
DSSSD+pad
detectors
for
Si
telescope
that
surrounds
implantation
point.
– Yields
were
as
expected
in
the
proposal
after
concern
that
they
might
be
much
lower.
– Lots
of
good
data,
showing
indications
of
the
high
transition
of
interest.
– Work
is
now
on
going
to
analyse
the
full
statistics
data
set.
A.O.B.
• Scheduling
– Schedule
is
now
published
until
early
September.
Wk33
still
to
be
negotiated.
• INTC
– INTC
deadline
is
at
5pm,
strictly,
without
exception.
Minutes
taken
by
LPG
Date
2017-05-31