1. Magnet System (주 장 비)
Actively shielded superconducting magnet (54mm bore size) for sample diameters 1mm to
10mm
(1) Magnet field strength : 9.4 Tesla or more
(2) Cryogen hold time : L-He > 300 days or more / L-N2 > 16 days or more
(3) Magnet stray fields, 5 gauss line from magnet center
- Horizontal distance : 0.5 m or less
- Vertical distance : 1.0 m or less
(4) Field drift rate : 4 Hz/Hr or less
(5) Shim system : 36 orthogonal shims gradients or more, low current and low heat dissipation
design for optimum line shape for non-spinning sample to obtain maximum signal intensity.
2. Spectrometer Console (주 장 비)
(1) Frequency channels
Fully broadband frequency generation with three numerically controlled oscillators for two
channels
1) Channel number : 2 channels or more
2) Frequency range
a) Channel 1 : 20-410MHz or wider
b) Channel 2 : 20-410MHz or wider
3) Frequency resolution : 0.005 Hz or less
4) Phase resolution : 0.01° or less
5) Amplitude resolution : 1 dB or less
6) Coarse amplitude control (attenuation) of 90dB
or more
7) Fine amplitude control (modulation) of min. 79dB
or more
8) Intermediate frequency : 720 MHz or more
(2) Digital receiver system
1) Effective dynamic range of digitizer
a) SW < 5 MHz : > 16 bit
b) SW < 1 MHz : > 18 bit
c) SW < 6 KHz : > 22 bit or better
2) Quadrature receiver : Quadrature image peaks with
digital quadrature detection : 0 %
(3) Amplifier system requirements:
1) Amplifier #1
a) Max. pulse power : 50 Watt or more
b) Frequency range : 1H/19F : 180 - 400 MHz
or wider Broadband : 14 - 160 MHz
2) Amplifier #2
a) Max. pulse power : 135 Watt or more
b) Frequency range : 1H/19F : 180 - 400 MHz
or wider Broadband : 14 - 160 MHz
3) Amplifier #3
a) Max. pulse power : 3 Watt or more
b) Frequency range : 2H or more
(4) Deuterium Lock
a) Digital lock system with digital filter or equivalent
b) Digital quadrature lock receiver for highest sensitivity
c) Fast-field adjustments with sample-and-hold circuit
d) Variable lock frequency for operation at selectable field
f) Shim control boards with ultra-stable high-precision, low-noise shim current sources.
(5) Timing controller for the exact timing with min. 12.5 nanosec time resolution.
(6) High performance receiver for acquisition of NMR data with oversampling and digital filtering,
min. 5MHz band width.
(7) High performance digitizer with min 22 bit effective dynamic range at 6 KHz.
(8) Fast Ethernet based communication and control system for bi-directional connection to the host
computer.
(9) Preamplifier system
1) 1H preamplifier, low noise GaAs design
2) 2H preamplifier (for lock and 2H observe)
3) Broadband preamplifier 6-430MHz
4) Built-in tune/match display module
3. Probe (부속장비)
15N-31P/19F{1H} 5 mm broadband detection probe with actively shielded Z-gradient coil and automatic tuning and matching for all nuclei
(1) Observation/Irradiation of all NMR nuclei in the range 31P to 15N
(2) Any of these nuclei can be fully automatically selected and optimally tuned and matched
(3) Observation of 19F with 1H decoupling and to perform two dimensional 1H/19F spectroscopy with superior quality
(4) Non-spin line shape (Resolution) for 13C: less than
a. 0.2 Hz at 50%
b. 2 Hz at 0.55%
c. 4 Hz at 0.11%
(5) Sensitivity: minimum
a. 500 : 1 for 19F TFT
b. 200 : 1 for 13C ASTM
c. 150 : 1 for 31P TPP
d. 25 : 1 for 15N 90% Formamide
e. 480 : 1 for 1H 0.1%EB
(6) 90o pulse widths: less than
a. 18 us for 19F TFT
b. 10 us for 13C ASTM
c. 8 us for 31P TPP
d. 21 us for 15N 90% Form.
f. 10 us for 1H 0.1%EB
(7) VT: -150oC to + 150oC or wider
