Upload
others
View
5
Download
0
Embed Size (px)
Citation preview
Multiple-Reflection Time-of-Flight Mass Spectrometers
Stabilization Boxes
Samuel Ayet San Andrés
HV Pulser + Stabilization
HV PULSER (LOW POWER ~ 5W, HV):
• Switching frequency: DC to 200kHz
•Minimum pulse width of ~ 200 ns
•Voltage stability (HV+) under 1ppm for hours
• Maximum differential voltage HV+ to HV- of 2.5kV
• Maximum absolute voltage HV+ and HV- of 5kV
HV -
OUTHI = HV+STABILIZED HIGH
VOLTAGE
PULSER
HV + Stabilized
TTL GALVANIC
INSOLATION
HV+
LPF
STABILIZATOR
OUTLOW = HV-
HV + Stabilized
<1ppm
HV-
High Voltage Pulser - High Voltage Stabilization Box
HV Pulser – Half Bridge Push-Pull
HV Pulser + Stabilization
IN TTL
HV OUT
LOAD: 1m RG-58
10kHz Rep. Rate
HV Pulser - Signal
Time-of-Flight Analyzer:
• 8 Stabilized Electrodes | Pulsed & Non-Pulsed
• 4 pulsed (~kV) | 4 non pulsed (~kV)
• Symmetric EL 1.X = EL 2.X (half turn delayed)
P EL 1.1
P EL 1.2 NP EL 1.3
NP EL 1.4
NP EL 2.4
NP EL 2.3 P EL 2.2
P EL 2.1
MR-TOF-MS
Time-of-Flight Analyzer
Trap System
Broadband Mode
t
A
MR-TOF-MS
~1m
TOF Analyzer
Post Analisys Reflector
Detector and gate
𝑞𝐸 = 1
2𝑚𝑣2
𝑣 = 𝑙
𝑡
t
Broadband Mode
High Resolution Mode
A
A
t
MR-TOF-MS
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
-1.00
-0.75
-0.50
-0.25
0.00
0.25
0.50
0.75
1.00
T
OF
De
via
tion
(p
pm
)
Time (h)
TOF = 15.33256 ms | FWHM ~ 20 ns | 133Cs+
Ion Time-of-Flight Stability
MR-TOF-MS @ GSI
MR-TOF-MS @ JLU
10-7 mbar
Vacuum Separation
0.5
m
RFQ Cooler
Injection Trap
Einzel lens
Mass filter
TOF Analyzer
Mass Range Selector
Ion guide
Skimmer Lens
Heated capillary
10-2…10-4 mbar
10-2 mbar
API
MCP Detector
1 bar
1.2 m
0.8 m
Inlet
TITAN @ TRIUMF
RF
Injection
Trap
MCP
Thank You!