▶ CIQTEK EPR-Spektrometer
Modernization and Upgrade
Pathways
▶
Microwave Bridges
CW Microwave Bridge Features
X-band
• Microwave frequency range: 9.2 to 9.9 GHz
• Max output microwave power in leveled mode: 200 mW
• Microwave attenuator: 0 to 60 dB in 1 dB steps
• Support automated and manual tuning
• Modernizable to Q-band
• Size: 85 × 62 × 18 cm
Q-band
• Microwave frequency: ≈ 34 GHz
• Microwave power range: 50 to 80 mW
• Microwave attenuator: 0 to 50 dB in 1 dB steps
• Size: 56 × 56 × 13 cm
Pulsed Microwave Amplifier Features
Solid-state amplifiers have the same linearity and intermodulation distortion as traveling-wave tube amplifiers. Still, they are smaller, have a longer life, and do not require high-voltage power supplies or periodic operation.
X-band
• Microwave amplifier power: 450 W
• Size: 48 X 44 X 22 cm
Q-band
• Solid-state power amplifier power: 150 W
• Size: 43 × 35 × 15 cm
▶ EPR
Spectrometer Console & Magnetic Power Supply
CW Part Features
1. Magnetic Field Controller:
Magnetic field stability in sample region: 10 mG/hour; Operating range: -0.1 to 1.8 T
2. Digital Lock-in Detection
3. Ultra Stable Magnet Power Supply
4. Modulation Frequency Range:
0.5 to 120 kHz
Pulsed Part features
Data Acquisition Unit
• Number of channels: 2
• Sampling rate: 1 GHz
• Supports internal and external trigger modes
Pulse Generator
• 12 digital channels
• Time resolution: 0.05 ns
Resonatoren
▶
High-Q Resonator
1. Cavity resonance frequency: 9.5 to 9.9 GHz
2. Unloaded Q ≥ 18,000 (critically coupled)
3. Maximum modulation field amplitude: 20 Gauss
4. Compatible with nitrogen and helium variable t
emperature system
5.
Autotune available
Resonator width: 50 mm
Optical window: Ø 5 mm, compatible with optical fiber
Maximum sample access: Ø 10 mm
▶
Dual Mode Resonator
1. Cavity resonance frequency：9.6 to 10 GHz (perpendicular mode) 9.4 to 9.8 GHz (parallel mode)
2. Maximum modulation field amplitude: 10 Gauss
3. Compatible with nitrogen and helium variable t
emperature system
Resonator width: 46 mm
Optical window： Ø 5 mm, compatible with optical fiber
Maximum sample access: Ø 10 mm
▶
PW-4201-DR Pulsed Resonator
1. Cavity resonant frequency: 9.4 to 9.8 GHz
2. Resonator bandwidth: 400 ± 40 MHz
3.
Detection dead time: ≤ 100 ns
4. Compatible with nitrogen and helium variable temperature system
Sample rod: 423 mm
Optical window: 5 × 12.5 mm
Flange: KF50
Available sample tube diameter: 3 mm or 4 mm OD
▶
ENDOR Pulsed Resonator
1. Cavity resonant frequency: 9.4 to 9.8 GHz
2. Resonator bandwidth: 400 ± 40 MHz
3.
Detection dead time: ≤ 100 ns
4. Compatible with nitrogen and helium variable temperature system
Sample rod: 423 mm
Optical window: 5 × 12.5 mm
Flange: KF50
Available sample tube diameter: 3 mm or 4 mm OD
Cryogenic Systems
▶
Liquid Helium Continuous-Flow Cryogenics System
Controllable temperature range of sample area: 3.2/4.4 to 300 K
Temperature stability: ± 0.1 K (in liquid helium temperature zone)
Rapid cooling: cooling time < 30 min
Low liquid helium loss
Easy installation
▶
Liquid Helium-free Dry Cryogenic System
Controllable temperature range of sample area: 4 to 300 K
Temperature stability: ± 0.1 K (in liquid helium temperature zone)
Wider temperature control range
Stable and easy operation
Rapid temperature recovery after sample change (<30 minutes)
Extremely low operating costs
-
-
L-type Cryostat
Compatible with DR pulsed resonator and ENDOR resonator.
Cavity ID: 45 mm (wet system); 43 mm (dry system)
▶
Liquid Nitrogen Variable Temperature System
Controllable temperature range of sample area: 100 to 600 K
Temperature stability: ± 0.2 K
Rapid cooling: cooling time < 30 minutes
Compatible with high-temperature test
