10/31/2009
1
Light ScatteringLight ScatteringLight ScatteringLight ScatteringHardware…. Etc.Hardware…. Etc.
Eben S. CrossEben S. CrossEben S. CrossEben S. Cross
AMS User’s MeetingAMS User’s Meeting
October 31, 2009October 31, 2009
TorontoToronto
10/31/2009
2
2.0
1.5
MS
"
Eben System
AMS‐Patience Plot
“Your job is awesome”
1.0
0.5Pat
ienc
e to
war
d an
ythi
ng "A
M Made a romantic dinner.
Went apple picking insteadof working on User’s meeting presentation.
Told her I was going to be in Renoon her birthday.
“Your job is neat”
0.0
35030025020015010050
Days
Left for AAAR and User’s meeting “I hate your job”
Reno, 2007
2.0
1.5
MS
"
Eben System Eben's Previous Relationship System
AMS‐Patience Plot
“Your job is awesome”
Told Meridith that I was going to auction off random AMS parts to raise $$ for the wedding…
1.0
0.5Pat
ienc
e to
war
d an
ythi
ng "A
M
“Your job is neat”
0.0
35030025020015010050
Days
“I hate your job”
~ Jan. 9, 2009
Reno, 2007
10/31/2009
3
Planning a Wedding Planning an AMS Field Deployment
• Deliver & Win ‘Proposal’ • Deliver & Win ‘Proposal’
High Stress PreparationRelief
JubilationTHE REAL PLANNING
BEGINS
• Decide on a location • Decide on a locationRunning Water
ElectricitySomething to do during Manuel’s Talk Later TodayDecide on a location Decide on a locationElectricity Porta Potties‘Beauty’
• Build the guest list • Build the guest list‘A‐Team’‘B‐Team’‘C‐Team’
Endless politics..
Something to do during Manuel’s Talk Later Today..
http://www.kasiaciesla.com/meridithandeben/
• Become OCD about details…
• Become OCD about details…
Design the ‘experiment’ such that the outcome has a unique, important, positive and lasting influence for years and years
Meridith & Eben ‐1
Anniversary
Doug & John & Everyone Else
10th Anniversary
Light ScatteringLight ScatteringHardwareHardware(for real)(for real)
Eben S. CrossEben S. CrossEben S. CrossEben S. Cross
AMS User’s MeetingAMS User’s Meeting
October 31, 2009October 31, 2009
TorontoToronto
10/31/2009
4
Light Scatter (LS) Acquisition using an External Trigger Circuit for ToF AMS Systems
543
6420
NI_StopTrigger
Vref
Chopper pulse
LS pulse
-1.0-0.8-0.6-0.4-0.20.00.2
Vol
ts
0.0060.0040.0020.000-0.002
Time(s)
3210
Comparator/Trigger Event Latched Trigger with Chopper Reset Summed Chopper+LS
DIO4 reset
DIO3 reads red trace
Time(s)
• HARDWARE: MUCH IMPROVED sampling duty cycle for single particles (>80% of all chopper cycles sampled)• SOFTWARE: Single Particle Processing – Squirrel Functionality… it’s almost there!
EBEN’S SUNDAY TALK• MANUSCRIPT: Results from initial Mexico City deployment FINALLY PUBLISHED in ACP! TIM’S SATURDAY TALK
Ricor MicroStarTM Cryopumpfast pump out / background reduction in ARI Aerosol Mass
Spectrometer ionizer chamber
http://www.ricor.com
• Cryoshiled surrounds ionizer• Mounted between P5 (V301) and chamber
•1000 Ls-1 pumping speed for water• 17 kg (38 lbs)• 400 Watts start-up at 50 VDC
(~200W normal load) Slide stolen from J. T. Jayne circa 2003Cryopump stolen from J. T. Jayne, 2009
10/31/2009
5
Cold Finger
ARI Lab AIR. AMS Valve OPEN. Initial Cool Down of Cold Finger Pumping overnight – after being vented for ~ 2 days
10/31/2009
6
Later on that Evening…. ARI Lab AIR.
786 single particles saved/20 mins of ‘ambient’ sampling!ambient sampling!
Later on that Evening…. ARI Lab AIR. EBEN’S LS ANALYSIS TALK ON SUNDAY
10/31/2009
7
ARI Lab AIR.
~24,000 single particles saved/15 hours of ‘ARI AIR’ sampling!
Warming Cold Finger Back up: ARI Lab AIR.
10/31/2009
8
Cool DOWN (2) After transport to BOSTON COLLEGE
AMBIENT – BOSTON COLLEGE COOL DOWN #2EBEN’S LS ANALYSIS TALK ON SUNDAY
10/31/2009
9
A
BOSTON COLLEGE GAMEDAY SAMPLINGEBEN’S LS ANALYSIS TALK ON SUNDAY
CHEM DEPT
B