spectrap electronics stefan stahl measurements by stefan stahl & zoran angelkovic latest result...
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![Page 1: Spectrap Electronics Stefan Stahl measurements by Stefan Stahl & Zoran Angelkovic Latest result of commissioning and tests](https://reader030.vdocuments.mx/reader030/viewer/2022032702/56649cf75503460f949c6bcc/html5/thumbnails/1.jpg)
Spectrap Electronics
Stefan Stahl
measurements by
Stefan Stahl & Zoran Angelkovic
Latest result of commissioning and tests
![Page 2: Spectrap Electronics Stefan Stahl measurements by Stefan Stahl & Zoran Angelkovic Latest result of commissioning and tests](https://reader030.vdocuments.mx/reader030/viewer/2022032702/56649cf75503460f949c6bcc/html5/thumbnails/2.jpg)
Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Preface: main objectivesPreface: main objectives
challenge : low final temperature close to 4.2K
• Resistive Cooling of captured ions to T = 4.2K and ion detectionResistive Cooling of captured ions to T = 4.2K and ion detection
• Rotating Wall CompressionRotating Wall Compression
• FT-ICR Detection (optional)FT-ICR Detection (optional)
challenge : FT-ICR and rotating wall compression at the same time
m · D²
q² · R
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Amplifiers and FiltersAmplifiers and Filters
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Coils and Electronics Base PlateCoils and Electronics Base Plate
Teflon-isolated copper-wireon a PEEK core
Base Plate connectedto Alu-flange, holdingThe trap structure
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Arrival DetectorArrival DetectorIdea: Schottky Pickup Detects Arrival of Ions => and Captures the Ions
Challenge: Height Image Pulse ~ 105e ~ 300µVCapture Pulse: 1kV / 25ns ~ 3Mio times higher signal on Detector
STRONG Protection needed !
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Arrival DetectorArrival Detector
3rd Version
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Arrival DetectorArrival Detector
enc = 780 erms (elementary charges)
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Integration Test at 300K and 77KIntegration Test at 300K and 77K
• Cryogenic Biasing Filters
• Axial Amplifiers (GaAs FETs)
• Cyclotron Amplifiers
• All together in Conjunction with Room Temperature Box
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Amplifier/Resonator Noise Tests, 77KAmplifier/Resonator Noise Tests, 77K
500kHz-coil 1.5MHz-coil
Cyclotron Detector:
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Summary and OutlookSummary and Outlook• All amplifiers and filters have been successfully
tested at 300K and 77K
• Cooling Resonators work as expected
• Integration tests (300K & 77K) have been accomplished successfully
• Arrival Detector (3rd version) has been improved and tested at 4.2K, enc = 780e rms
• Tests WITH trap mounted and connected to electronics, adjust resonator frequencies @ 300K
• Test Rotating Wall coupling to electrodes
• Final integration test inside magnet and at 4.2K
• Software control of devices
To do (next weeks)
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Thanks a lot foryour attention.
Email: [email protected] www.stahl-electronics.com
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Spare Slides:Spare Slides:
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Examples of Coil-Design
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Pickup-Elektrode
Pickup-Elektrode
x
y
Detection of Image Charges, FT-ICRDetection of Image Charges, FT-ICR
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Pickup-Elektrode
Pickup-Elektrode
ion currentsignal
I
t
Detection of Image Charges, FT-ICRDetection of Image Charges, FT-ICR
x
y
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Pickup-Elektrode
Pickup-Elektrode
ion currentsignal
I
Detection of Image Charges, FT-ICRDetection of Image Charges, FT-ICR
x
y
very smallsignal ~fA
Signal strength
D ~ distance of pickup electrodes
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Pickup-Elektrode
Pickup-Elektrode
ion currentsignal
z
Voltage/Current Amplifier
Pe nning Tra p(c ro ss se c tio n)
ra d ia lly sp lit e le c tro d eslit
FFTFou rie r-Transfo rm - spectra l analyser
excited ion
m agnetic fie ld
low noiseAm p.
timetime-domain frequency-domain
I
frequency
dP /d fion current signal
mass spectrum
FFT
q/mspectrum
II
t f
x
y
very smallsignal ~fA
Detection of Image Charges, FT-ICRDetection of Image Charges, FT-ICR
„FT-ICR“ Fourier-Transform Ion Cyclotron Resonance
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Detection of Image Charges, FT-ICRDetection of Image Charges, FT-ICR
• Method is non-destructive
• Many ion species can be detected at the same time
• Small sensitivity to space charges compared to TOFSmall sensitivity to space charges compared to TOF
• Useful over a very wide range of ion numbersUseful over a very wide range of ion numbers
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
FT-ICR CircuitryFT-ICR Circuitry
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
First HFirst H22OO++ Resonance: Resonance:
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Spectrap Collaboration Meeting, 1. March, 2010
Spectrap Evaluation of Cryogenic Components
Shot Noise by Ions and ElectronsShot Noise by Ions and Electrons
Creating shot noise while flying through
1010 electrons/sec. ~ 6 fA/ (Hz)1/2 1012 ions/sec. ~ 700 fA/ (Hz)1/2