Transcript Cosmic dust Reflectron for Isotopic Analysis (CRIA)

Cosmic dust
Reflectron for
Isotopic
Analysis
LAMA
(A cria is a baby llama)
CRIA
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Dust in Space!
Space dust provides important clues on the
formation and composition of our solar
system as well as other stars.
Several instruments have been
launched on past missions to analyze
the flux and composition of space dust
in-situ.
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Time-Of-Flight (TOF) Mass Spectrometers
• Dust is ionized against a target and accelerated through an
electric field to a detector.
• Ion mass is inferred from Time-Of-Flight.
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CDA
CIDA
Time-Of-Flight (TOF) Mass Spectrometers
• Large target area
• Low mass resolution
• High mass resolution
• Small target area
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CDA
CIDA
Large Area Mass Analyzer
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Large Area Mass Analyzer
• TOF Mass
Spectrometer
• Large target area
comparable to CDA.
• High mass resolution
comparable to CIDA.
• Lab prototype
constructed and tested.
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LAMA: What is still needed for
dust astronomy?
Several tasks have yet
to be completed:
DTS
• Create a dust
triggering system
• Create a
decontamination system
• Show instrument can
survive in space
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How does a
TOF mass spec work?
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CRIA: Mass Analyzer Primary
Subsystems
IONIZER
Target
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CRIA: Mass Analyzer Primary
Subsystems
ANALYZER (Ion Optics)
Annular Grid Electrodes
Ring Electrodes
Grounded Grid
Target
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CRIA: Mass Analyzer Primary
Subsystems
DETECTOR
Detector
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CRIA Concept: Operation
incoming dust particle
Example Dust Composition
Key
Species-2
Species-3
Target
Increasing mass
Species-1
Example Spectrum
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CRIA Concept: Operation
negative ions and electrons accelerated to target
target material also ionizes
dust impacts target and ionizes (trigger t0)
Example Spectrum
t0
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CRIA Concept: Operation
positive ions accelerated towards grounded grid (trigger t1)
Ions of Species-1, Species-2, Species3, and Target Material
Example Spectrum
t0
t1
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CRIA Concept: Operation
Positively charged particles focused
towards detector
Example Spectrum
t0
t1
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CRIA Concept: Operation
Species-1 ions arrive at
detector
Ions of the same
species arrive at the
detector at the same
time with some spread
Species-1 arrives at detector
Example Spectrum
t0
t1
t2
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CRIA Concept: Operation
Species-2 ions arrive at
detector
Species-2 arrives at detector
Example Spectrum
t0
t1
t2
t3
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CRIA Concept: Operation
Species-3 ions arrive at
detector
Species-3 arrives at detector
Example Spectrum
t0
t1
t2
t3 t4
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CRIA Concept: Operation
Target material ions arrive at
detector
m/Δm: mass resolution
Target material has characteristic peak
Example Spectrum
t0
t1
t2
t3 t4 t5
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CRIA Project Phases
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Design
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Build, Assembly, &
Integration
3
Testing
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CRIA Design
Design is complete for all subsystems.
Analyzer
Structures
Detector
Thermal
Ionizer
Electronics/
CDH
However, certain design elements will
need to be revisited during the
build/assembly/integration phase.
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Project Dan
Motivation
Baker
(~6ft tall man)
Scale down LAMA to a size
better suited for inclusion on
missions of opportunity.
LAMA (struc support)
CRIA models
Improve the Technological
Readiness Level (TRL) of the
LAMA concept from TRL 4 to
TRL 5.
CRIA
LAMA
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Structure: Main Assembly
Detector Assembly
Main Housing Assembly
Target Assembly
Annular Electrode Assembly
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Structure: Parts Summary
Annular Electrode Mount
Annular Electrode Support
Annular Electrodes
Ring Electrodes
Ring Electrode Standoffs
Grounded Grid
Target
Hexagonal Base
Detector
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Structure: Main Housing Assembly
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Electrical Block Diagram
(Preflight Design)
Inside
Electronics
Lab Supporting
Electronics
CRIA
Amplifier Box
Coax
CSA
POWER
Max: <25 W
Coax
CSA
DET
CSA
Oscilloscope
(500 MHz)
CSA
Coax
Target
HV wire
Ring Electrodes
HV wire
Annuli Electrodes
HV wire
Divider
Box
(+6kV)
HV wire
HV wire
Detector
(-1~2 kV and -100V)
CSA
(6V, 14mW)
HV Supply 1
(+20kV)
0.15W
HV Supply 2
(-3 kV)
0.6pW
Voltage
Supply
~24W
Decontam. Heater
(11.5 V, 24W)
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CRIA Build, Assembly, &
Integration
Machining:
Mechanical Assembly:
• All ring electrodes
• All of Detector Assembly
• Electronics boxes
• All Insulator pieces
• Adapter plate for testing
• Test Plan for assembly testing
• Wire harnessing
• Solder connection from electronics
assembly to electrodes
• Pre-test cleanliness requirements met
Electronics work:
• Component testing
• Voltage divider assembly
• CSA and VD testing
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Cable Layout
Heater/CSA
High Voltage – Ion Optics
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Cable Layout: Solder Access
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Mechanical Ground Support
Equipment Interfaces
• Remove-before-flight cover
• Thermal Vacuum/Vibration Adapter Plate
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CRIA Testing
Two test will be performed by December:
• Vacuum Chamber
• Thermal Vacuum Chamber (TVAC)
• Vibration Testing (potentially done by LASP)
Pre-Test Work:
• Test Plan for TVAC includes setup of laser in chamber
• Potentially use Bakeout chamber at LASP
• Acquire necessary hardware
• Data acquisition / data reduction
Testing Work:
• Man hours testing in both Vac and TVAC tests
• Acquire data
• Write report
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Schedule
Machining
Assembly
Testing
Test Plan /
Documentation
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Organizational Structure
Customer
Z. Sternovsky
Administration
Manufacturing
Professional
M. Rhode (CU)
System Engineer
Project Manager
L. Brower
Student Lead
D. Turner
CU Advisors
X. Li
S. Palo
Professional
M. Lankton (LASP)
Structures
Professional
P. Graf
Thermal
Electronics
Student Lead
D. Turner
Student Lead
L. Brower
Student Lead
W. Tu
Professional
S. Steg (LASP)
Professional
B. Lamprecht
(LASP)
Professional
V. Hoxie (LASP)
Materials
Ion Optics
Detector
Student Lead
D. Lee
Student Lead
L. Chang
Student Lead
D. Turner
Professional
G. Drake
(LASP)
Experienced
Graduate
K. Amyx (CU)
Professional
G. Drake
(LASP)
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Let’s sign up for interviews!
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