Equipment
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Teaching Spectrometers
1.3 mT spin simulator
15 MHz spectrometer. A fully operating NMR system at 15 MHz.
Liquid State NMR Spectrometers
Bruker AV950
Features: CryoProbe, PC-Workstation (Linux)
Bruker AV900
5 mm TXI CryoProbe 1H{13C/15N} with Z-Grad (S/N: 7500:1)
5 mm TXI RT 1H{13C/15N} with XYZ-Grad (S/N: 2300:1)
5 mm TXI RT 1H{13C/31P} with XYZ-Grad (S/N: 2300:1)
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 2000:1)
Features: CryoProbe, UltraStabilized, 3 x 1000 W amplifier, 6 channels, PC-Workstation (Linux)
Bruker AV800
5 mm TXI CryoProbe 1H{13C/15N} with Z-Grad (S/N: 8000:1)
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 1700:1)
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 1700:1)
5 mm TXI RT 1H{13C/31P} with XYZ-Grad (S/N: 1700:1)
5 mm QXI RT 1H{13C/15N/31P} with XYZ-Grad (S/N: 1200:1)
Features: CryoProbe, UltraStabilized, 4 channels, PC-Workstation (Linux)
Bruker AV700
5 mm TXI CryoProbe 1H{13C/15N} with Z-Grad (S/N: 5500:1)
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 1450:1)
Features: CryoProbe, UltraStabilized, 3 channels, PC-Workstation (Linux)
Bruker AV600
5 mm TXI CryoProbe 1H{13C/15N} with Z-Grad (S/N: 6000:1)
5 mm TCI Cryoprobe 1H{13C/31P} with Z-Grad (S/N: 6000:1), optimized also for 13C direct detection
Features: CryoProbe, 4 channels, PC-Workstation (Linux)
Bruker AV600
5 mm TCI Cryoprobe 1H{13C/15N} with Z-Grad (S/N: 6000:1), optimized also for 13C direct detection
5 mm TXI RT 1H{13C/15N} with XYZ-Grad (S/N: 1200:1)
Features: CryoProbe, 4 channels, PC-Workstation (Linux)
Bruker DRX600
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 1200:1)
5 mm TXI RT 1H{13C/31P} with Z-Grad (S/N: 1100:1)
5 mm TXI HR-MAS 1H{13C/15N} with Z-Grad
Features: HR-MAS, 4 channels, PC-Workstation (Linux)
Bruker AV500
5 mm TXI RT 1H{13C/15N} with XYZ-Grad (S/N: 900:1)
Features: 3 channels, PC-Workstation (Linux)
Bruker DRX500
5 mm TXI RT 1H{13C/15N} with XYZ-Grad (S/N: 900:1)
Features: 4 channels, PC-Workstation (Linux)
Bruker AV400
5 mm TXI RT 1H{13C/15N} with Z-Grad (S/N: 700:1)
5 mm TBI RT 1H{13C/BB} with Z-Grad (S/N: 500:1)
5 mm BBI ATM 1H{BB} with Z-Grad (S/N: 730:1)
Features: For very low temperature, with ATMA, 3 channels, PC-Workstation (Linux)
Solid State NMR Spectrometers
Bruker AV850 widebore
Bruker AV600 widebore
4 mm TXI CP MAS 1H{13C/15N}
4 mm CP MAS 1H{13C-31}
static probe flat coil 1H, 13C, 15N, 31P
Features: 1000 W proton amplifier, SW 20Mhz, low temperature equipment, Airjet crystal cooler, UltraShielded, 3 channels, PC-Workstation (Linux)
Bruker AV600 widebore
4 mm TXI CP MAS 1H{13C/15N}
7mm TXI CP MAS 1H{13C/15N}
7 mm CP MAS 1H{13C-31P}
static probe flat coil 1H,13C,15N,31P
solenoid coil 1H, 31P
Features: 1000 W proton amplifier, SW 20Mhz, low temperature equipment, Airjet crystal cooler, UltraShielded, 3 channels, PC-Workstation (Windows), 5 W Argon Ion Laser
EPR Spectrometers
Bruker Elexsys E580 Spectrometer
Operating frequency 9-12GHz
cw-EPR, pulsed EPR, ENDOR and PELDOR
Temperature range: 4K - RT
EPR S-band homebuilt
Since 1998, a spectrometer has been developed whose operating frequency can be set between 2.7 and 3.7 GHz, corresponding to magnetic fields of 900 to 1300 G. This spectrometer is mainly used for pulsed EPR, although also cw experiments are feasible. The probehead is located inside an Oxford Instruments CF935 cryostate, whose temperature can be controlled between 4 K and roomtemperature. In the recent setup, different bridge-loop-gap cavities [1] are used. All devices are connected to an Intel Pentium PC via an IEEE 488 bus. Data acquisition and experiment control is done by means of a homewritten C program running under a linux enviroment.
ESP300 X-band
This is a cw ESP300 X-band spectrometer manufactured by Bruker AG. The spectrometer was a gift of Prof. Dr. H. Bock and was installed in the university in 1979. Several different cavities are in use, allowing us to perform normal as well as parallel mode EPR and including ENDOR-type experiments. Two different cryostats can be applied to the system, allowing the control of temperature in the range from 4 - 353 K. Either liquid helium or liquid nitrogen can be used for cooling the cavities. Experimental control and data acquisition is performed by means of a computer. The system is equiped with a signal channel (ER 023), a digital field controller (ER 032M), a FF-Lock (ER 033) and a NMR-Gaussmeter (ER 035M). All these components are located in the console (ER 220 D LR). For ENDOR measurements, a cylindric ENDOR cavity (EN 801) is used. The radio frequencies are synthesised by a Wavetek 3000 synthesiser and are amplified by a solid-state 300 W ENI Amplifier (ENI A-300). The whole system is controlled by a real-time computer (OS-9).
G 180GHz homebuilt
Since 1998, a spectrometer has been developed with an operating frequency of 180 GHz and corresponding magnetic fields of 6.4 Tesla. Two different setups have been developed: A transmission mode setup working without a cavity and a setup working with a cylindrical closed type cavity . This is the highest frequency worldwide used in conjunction with a cylindrical cavity.
The cryogenic Teslatron H magnet system provided by Oxford Instruments consists of two superconducting coils. One of them produces a static magnetic field in the range of 0 - 7 Tesla and is normally set to 6.422 Tesla, corresponding to 180 GHz for g=2. To reduce liquid helium consumption, the current leads can be replaced by a short plug. The second superconducting coil serves as a sweep coil and allows to sweep over a range of +/- 80 mT. The homebuilt power supply for the sweep coil is connected to a PC via the serial port and has a resolution of 18 bit, corresponding to 0.61 µT. The magnet has an inner bore diameter of 74 mm, whose temperature can be controlled between 4 K and roomtemperature. All EPR - experiments are controlled by an Intel Pentium 200 MHz PC, to which the devices are connected via an IEEE 488 bus. Experiment control and data acquisition is controlled by means of a homewritten program written in LabView.
Linux Computer Cluster
1 double quad-core master node, 32 GB memory
20 double-quad-core compute nodes = 160 cores
Quad-core Intel Xeon E5462 CPUs (2.8 GHz, 12 MB cache)
2 GB memory/core = 16 GB memory/node
6 TB RAID system
