Cosmic dust Reflectron for Isotopic Analysis

1
Cosmic dust Reflectron for Isotopic Analysis
LAMA
(A cria is a baby llama)
CRIA
2
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.
3
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.

CDA
CIDA
4
Time-Of-Flight (TOF) Mass Spectrometers

• Large target area
• Low mass resolution

• High mass resolution
• Small target area

CDA
CIDA
5
Large Area Mass Analyzer
6
Large Area Mass Analyzer

• TOF Mass Spectrometer
• Large target area comparable to CDA.
• High mass resolution comparable to CIDA.
• Lab prototype constructed and tested.

7
LAMA What is still needed for dust astronomy?
DTS

• Several tasks have yet to be completed
• Create a dust triggering system
• Create a decontamination system
• Show instrument can survive in space

8
How does a TOF mass spec work?
9
CRIA Mass Analyzer Primary Subsystems
IONIZER
Target
10
CRIA Mass Analyzer Primary Subsystems
ANALYZER (Ion Optics)
Annular Grid Electrodes
Ring Electrodes
Grounded Grid
Target
11
CRIA Mass Analyzer Primary Subsystems
DETECTOR
Detector
12
CRIA Concept Operation
incoming dust particle
Example Dust Composition
Key
Species-1 Species-2 Species-3 Target
Increasing mass
13
CRIA Concept Operation
negative ions and electrons accelerated to target
target material also ionizes
dust impacts target and ionizes (trigger? t0)
t0
14
CRIA Concept Operation
positive ions accelerated towards grounded grid
(trigger? t1)
Ions of Species-1, Species-2, Species-3, and
Target Material
t1
t0
t1
t0
15
CRIA Concept Operation
Positively charged particles focused towards
detector
t1
t0
16
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
t1
t0
t2
17
CRIA Concept Operation
Species-2 ions arrive at detector
Species-2 arrives at detector
t3
t1
t0
t2
18
CRIA Concept Operation
Species-3 ions arrive at detector
Species-3 arrives at detector
t3
t4
t1
t0
t2
19
CRIA Concept Operation
Target material ions arrive at detector
m/?m mass resolution
Target material has characteristic peak
t3
t4
t5
t1
t0
t2
20
CRIA Project Phases
Design
1
Build, Assembly, Integration
2
Testing
3
21
CRIA Design
Design is complete for all subsystems.
However, certain design elements will need to be
revisited during the build/assembly/integration
phase.
22
Project Motivation

• Scale down LAMA to a size better suited for
  inclusion on missions of opportunity.

Improve the Technological Readiness Level (TRL)
of the LAMA concept from TRL 4 to TRL 5.
CRIA
LAMA
23
Structure Main Assembly
Main Housing Assembly
Detector Assembly
Target Assembly
Annular Electrode Assembly
24
Structure Parts Summary
25
Structure Main Housing Assembly
26
(No Transcript)
27
CRIA Build, Assembly, Integration

• Machining
• All ring electrodes
• All of Detector Assembly
• Electronics boxes
• All Insulator pieces
• Adapter plate for testing

• Mechanical Assembly
• 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

28
Cable Layout
29
Cable Layout Solder Access
30
Mechanical Ground Support Equipment Interfaces

• Remove-before-flight cover
• Thermal Vacuum/Vibration Adapter Plate

31
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

32
Schedule
Machining
Testing
Test Plan / Documentation
Assembly
33
Organizational Structure
Customer Z. Sternovsky
Administration
System Engineer
Project Manager L. Brower
Student Lead D. Turner
CU Advisors X. Li S.
Palo
Professional M. Lankton (LASP)
Professional P. Graf
Electronics
Thermal
Structures
Manufacturing
Student Lead D. Turner
Student Lead L. Brower
Student Lead W. Tu
Professional M. Rhode (CU)
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)
34
Lets sign up for interviews!