20 September 2017
ISOLDE Physics Group Meeting 20/09/2017
Technical news
• GPS
– GPS
setup
for
94Rb
went
very
well.
However,
problems
with
radiation
alarms
at
CA0
switchyard
on
Wednesday
night.
– Proton
current
limited
to
<0.10
µA,
added
more
shielding.
– Tried
to
improve
tuning
on
Thursday,
but
tiny
losses
still
giving
alarms.
– RP
involved
to
test
running
at
2.0
µA,
but
dose
was
too
high
for
VITO
who
were
setting
up
nearby.
– Proposal
to
close
off
hall
“not
supported”
on
Friday
so
weekend
ran
at
low
intensity
the
whole
time.
– Alberto
“improved”
the
tune
to
allow
0.70
µA
and
give
a
factor
of
5
at
Miniball.
• HRS
– Target
change
on
Monday
morning.
– Stable
beam
delivered
to
VITO
for
tuning
during
technical
stop
on
Tuesday
night.
• RILIS
– Scheme
development
for
Nd
ongoing,
to
be
tested
if
solid-state
lasers
can
be
used
instead
of
dye
lasers.
– Similarly
done
for
Sm
last
month,
this
means
less
maintenance
and
more
stability
in
the
power.
• REX/HIE
– Pulse
length
was
stretched
to
1.6
ms,
from
1.0
ms,
for
the
94Rb
run.
– Higher
power
demands
could
lead
to
more
trips
of
RF.
– Actually,
REX
and
HIE
both
running
with
remarkable
stability.
– Pulse
length
will
remain
at
1.6
ms
for
upcoming
runs.
• Targets
– #609
TaGdB6
target
has
been
on
the
offline
and
is
ready
for
Nd
to
Miniball.
– #599
Ti
rolls
target
reused
from
Mg
run
and
is
now
online
for
Na
to
VITO.
– #615
Ta
foils
target
is
finished
and
now
cooling
at
the
offline.
– #618
UCx
target
finished
too.
Sebastian
improved
the
preparation
procedure
so
that
only
4
days
are
required
for
the
carbonisation
of
the
Uranium.
• Safety
– The
issue
of
high
intensity
and
high
dose
rates
in
the
hall
will
be
followed
up
in
the
future
to
implement
a
procedure
to
safely
run.
It
could
be
a
limited
stay
in
radioactive
areas
or
a
complete
closure
of
the
hall.
– Discussions
are
on
going
with
everyone
involved
and
will
be
presented
at
the
PS-CSAP
in
the
near
future.
– In
addition,
the
chain
of
command
needs
to
be
improved
since
the
large
number
of
people
required
to
sign
off
was
prohibitive
to
the
physics.
– Currently
5
departments
have
equivalence
in
safety
issues
within
the
hall.
– Audit
of
building
170
by
CERN’s
RP
with
a
consultant
to
be
performed
in
coming
months.
A.O.B.
• Researchers night
– Karl
once
again
reminds
people
to
volunteer
for
the
ISOLDE
stand
at
European
Researchers
Night,
29th
September
from
1700-2300.
He
has
sent
an
email!
• Seminars
– Peter
Möller
will
give
a
series
of
seminars
on
2nd
and
3rd
October
with
discussions
afterwards.
Place
and
time
to
be
confirmed.
• Schedule
– Schedule
until
the
end
of
the
year
due
out
next
week.
Probably
there’ll
be
two
versions
depending
on
LIEBE
tests
on
GPS.
Minutes
taken
by
LPG
Date
2017-09-20