Magellan Associate Director Report

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Nov 15, 2013 (3 years and 10 months ago)

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Magellan
Associate Director
Report



Personnel



Observing Statistics



Commissioning of Instruments


Facility instruments


User (P.I.) Instruments



Clean Room



Operations



Earthquake

Personnel




Ricardo Covarrubias (Magellan Fellow) departed in early
December



No other personnel
c
hanges
during this reporting period



Search underway for Mechanical Engineer



Job ads run in both Chile and the USA



21 applications (deadline was 1 March)



5
-
6 interesting



Goal is to make an offer by the end of April

Observing Statistics

Baade + Clay

Telescopes Instrumentation Usage:

23 Feb 2009
-

27 Aug 2009

28 Aug 2009
-

9 Feb 2010

IMACS

37%

41%

MIKE

23%

16%

LDSS
-
3

8%

11%

PANIC

8%

11%

MagE

16%

11%

MIKE fibers

1%

4%

MagIC

7%

3%

PFS

--

3%

Observing Statistics:
Instrument Usage

28 Aug 2009
-
9
Feb
2010:

Observing Statistics

2.1%

0.2%

1.0%

0.9
%

11.5%

86.4%

Baade

0.7%

0.3%

0.1%

0.3%

9.8
%

89.5%

Clay

% Lost to Computer

% Total Downtime

% Lost to Instrument

% Lost to Telescope

% Lost to Weather

% Open

Observing Statistics:
Downtime

Instrument Downtime:

Observing Statistics

23 Feb 2009
-

27 Aug 2009

28 Aug 2009
-

9 Feb 2010

IMACS

1.6%

0.5%

MIKE

0.1%

0.0%

LDSS
-
3

0.1%

0.0%

PANIC

0.0%

2.8%

MagE

0.2%

0.0%

MIKE fibers

0.0%

0.0%

MagIC

1.3%

2.2%

PFS

--

1.2%

Commissioning of

Facility
Instruments



Successful commissioning
run in October



Image quality as good as
0.37
arcsec

across the full
0.5 degree FOV was
obtained



First real test of support
system for f/5 secondary



First science runs are
scheduled for April

Megacam
:

Commissioning of

Facility
Instruments (cont.)



Successful commissioning
run in early
-
December



Both imaging and
spectroscopic modes were
tested



First science runs are
scheduled for the March and
April bright runs

MMIRS:

Commissioning of

Facility
Instruments (cont.)



Passed pre
-
ship review in late
-
January



Instrument arrived at LCO without mishap and was assembled and
tested in the new clean room



Commissioning to begin in late this month

FIRE:

FourStar
:



Detector problems slowed progress



Pre
-
ship review to be held in May?



Commissioning likely to begin in 2010B semester

Clean Room



Clean room tent was installed by Alan
Uomoto

in early
-
December



Air conditioning system was finished in January



New transformer for ASB will be installed in March or April to handle
increased load of clean room HVAC system



Thanks to the efforts of Magellan and LCO staffs, the clean room was
readied (just) in time for the arrival of FIRE in late
-
February



Being used again right now by Harvard/SAO group to carry out work on
MMIRS

Operations



Clay primary mirror was aluminized in January



80.6% reflectivity at 530 nm before washing



90.1% reflectivity after washing



91.6% after coating



Baade primary mirror was washed in March



76.5% reflectivity at 530 nm before washing



90.1% reflectivity after washing



Why the 4% lower reflectivity of the Baade mirror before washing?



Had ~2 months more exposure than Clay mirror



CO
2

cleaning had also been temporarily suspended (2.5 months)
due to suspicions of grounding problems

Operations



The M1 server to correct the primary mirror for aberrations as a
function of elevation, is in regular use at both Clay and Baade. This was
successfully deployed for
MegaCam

commissioning and proved itself
with the excellent delivered image quality.



Collimation



Two probe is used for checking f/11 collimation.
Tests show scaling
errors in off axis astigmatism and coma corrections and probe
position dependent focus errors. More extensive sampling of the
focal plane and guider positions is required to deal with these
errors. These issues affect performance of the guiders under
normal operation.



Megacam

extra
-
focal
-
image
-
based alignment yields very rapid and
very accurate collimation for f/5 as evidenced by the 0.37" imaging
achieved across the field during commissioning.

Operations



Computers/Software



The Magellan operations computers have been upgraded to the
CentOS

operating system. The upgrade will mitigate various
situations that froze the computers and will make possible upgrades
to the telescope interface and active optics system that were difficult
under the old Red Hat system.



Operations efficiency has been improved by setting up
simultaneous initialization of all guider axes and simultaneous
initialization of the ADC prisms.



Work has begun on improving rotator reliability and
troubleshooting capabilities.



Testing of the fast tip/tilt secondary has begun at Baade. The initial
work done has been to improve data logging to characterize guide
errors. The telescopes do very well with standard guiding.

Operations



MagE



The
cryotiger

failed and was replaced.



The camera read noise occasionally rises and is fixed by a power
cycle.



MMIRS



We are exploring contracting of MMIRS mask cutting through
CTIO. Prospects look very good.

Operations



IMACS



Flexure compensation became unstable do to a failed connection.
It was repaired after extensive diagnosis.



A slow leak of the
Cargil

oil in the F2 camera was discovered. No
obvious source of the leak was found. Some mitigating repairs
were done. The system needs to be monitored.



Adjustment of SO9 lens has improved imaging at f2.



There have been some overheating problems in the electronic
racks.



Following an extensive investigation, the primary culprit for noise
on the IMACS f/2 camera was isolated to noise from the shutter
signal line.



A loose SH guider was found to be the cause of poor rotation
guiding. The stage was modified by Tyson Hare.

Earthquake



At 3:30 am on February 27, Chile was rocked by a powerful (8.8
mag

on the Richter scale) earthquake



Epicenter

was located 120 km north of Concepción and 320 km south
of Santiago



Damage was wide
-
spread and > 500 lives were lost



Although the quake was felt strongly at LCO, the observatory
installations were unaffected



Power was lost initially both at LCO and El
Pino
, but within 24 hours
operations were back to normal



Biggest problem was transportation of observers to and from the USA
due to the closure of the Santiago airport which suffered significant
damage



8 days passed before the first visitors were able to make it to LCO, and
those who were stranded were able to make it back to the USA

GPS
Measurements
Showing
Movement of
South American
Plate in Maule
Earthquake

Las
Campanas

moved 3 cm to
the west

Central and Southern Andes Project

Damage at Santiago Airport

Damage at Santiago Airport

Damage at Santiago Airport

Damage at Santiago Airport

Damage at Santiago Airport

Earthquake Preparedness



We have been slowly pursuing a number of events designed to better
protect the Magellan installations at LCO from future strong
earthquakes:



TCS monitors were changed to
LCDs

and have been bolted down
in Baade and Clay control rooms.



Hardware to secure the electronics racks located in the control
room and the equipment room has been purchased and is being
installed.



Seismic retro fit to reinforce the air and glycol tank mounts has
been completed. New collars and anchor bolts and restraints were
added.



Two seismic accelerometers were purchased and installed into the
telescope and enclosure emergency stop control systems. All
telescope and enclosure motion is now stopped when a significant
earthquake occurs. This installation required a change in the
emergency stop control PLC systems.

Earthquake Preparedness (cont.)



Other measures that we have identified but not yet implemented:



Suspended ceilings and light fixtures in Baade and Clay control
rooms, lounges, kitchen, and the ASB need to be either secured or
replaced. (El
Pino

as well)



Structural analysis for the GMT indicates that seismic
accelerations may be significantly amplified at both the secondary
and primary mirrors much more than previously assumed.



Should carry out a similar structural analysis for the Magellan
telescopes ($$$)



In the meantime, we will install accelerometers on one of the
Magellan telescopes to directly measure this effect



We need to update the emergency signs in all buildings so that
they conform with the current building code.



We should prepare a simple one page document that states what
do in an earthquake.