1. Magnet System

Actively shielded superconducting magnet (54mm bore size)

(1) Magnet field strength : 11.764 Tesla

(2) Cryogen hold time : L-He > 180 days / L-N2 > 16 days

(3) Magnet stray fields, 5 gauss line from magnet center

- Horizontal distance : 0.6 m

- Vertical distance : 1.2 m

(4) Field drift rate : 5 Hz/Hr

(5) Shim system : 36 orthogonal shims gradients, low current

and low heat dissipation design for optimum line

 

2. Spectrometer Console

(1) Frequency channels

Fully broadband frequency generation

1) Channel number : 2 channels

2) Frequency range

a) Channel 1 : 5-1,280 MHz

b) Channel 2 : 5-1,280 MHz

3) Frequency resolution : 0.005 Hz

4) Phase resolution : 0.01¡Æ

5) Amplitude resolution : 0.1 dB

6) Coarse amplitude control (attenuation) of 90dB

7) Fine amplitude control (modulation) of 79dB

8) Intermediate frequency : 1.852 GHz

(2) Highly integrated NMR RF transceiver (transmit and receive)

1) Effective dynamic range of digitizer

a) SW < 7.5 MHz : > 17 bit

b) SW < 1 MHz : > 19 bit

c) SW < 6 KHz : > 23 bit

(3) Amplifier system requirements:

1) Amplifier #1

a) Max. pulse power : 100 Watt

b) Frequency range : 180 - 600 MHz

2) Amplifier #2

a) Max. pulse power : 500 Watt

b) Frequency range : 15 - 600 MHz

(4) Deuterium Lock

1) Digital lock system with digital filter

2) Digital quadrature lock receiver for highest sensitivity

3) Fast-field adjustments with sample-and-hold circuit

4) Variable lock frequency for operation at selectable field

5) Shim control boards with ultra-stable high-precision,

low-noise shim current sources.

(5) Timing controller for the exact timing with 12.5 nanosec

(6) High performance receiver for acquisition of NMR data

with oversampling and digital filtering, 7.5MHz band width.

(7) High performance digitizer with 23 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

4) Built-in tune/match display module

 

3. L-N2 Cryoprobe

15N-31P/19F {1H } 5 mm broadband detection probe with

actively shielded Z-gradient coil and automatic tuning and

matching for all nuclei

(1) Sensitivity: minimum

1) 1,200 : 1 for 19F TFT

2) 750 : 1 for 13C ASTM

3) 410 : 1 for 31P TPP

4) 80 : 1 for 15N 90% Formamide

5) 1,350 : 1 for 1H 0.1%EB

(2) VT: 0oC to + 135oC

 

4. Auto sample changer

(1) Submit samples at desk height

(2) 24 sample positions

(3) Unique push-button operation