light scattering hardware…. etc. -...

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