Kgs. Lyngby, Denmark
- Type
- 25
- Procedure
- neg-wo-call
- Ref. number
- 604726-2025
- Estimated value
- 80,000 EUR
- CPV
- 38520000
DTU needs to purchase 2 separate amplifiers with power supply units, each suited for driving a uniaxial head insert gradient coil (60-70 micro-Henry) for animal and human magnetic resonance imaging (MRI), particularly fo…
r strongly accelerated hydrogen and hyperpolarized carbon-13 MRI. We aim for 3D mapping of brain metabolites with a time resolution of around a second for calculation of metabolic rates. To compensate for the low gyromagnetic ratio of carbon-13, for a 10 kHz sinusoidal gradient, the amplifiers must
sustain peak voltages >1000 V and peak currents >260 A (at 20 kHz: >1000 V and >130 A). Arbitrary waveforms up to 20 kHz must be suited for normal high-performance MRI. The maximum duty cycle needs to be high (preferably 100% at 10 kHz) dur