Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy

Sudheer Jawla; Qing Zhe Ni; Alexander Barnes; William Guss; Eugenio Daviso; Judith Herzfeld; Robert Griffin; Richard Temkin

doi:10.1007/s10762-012-9947-1

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Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy

Journal article

Open access

Peer reviewed

Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy

Sudheer Jawla, Qing Zhe Ni, Alexander Barnes, William Guss, Eugenio Daviso, Judith Herzfeld, Robert Griffin and Richard Temkin

Journal of infrared, millimeter and terahertz waves, Vol.34(1), pp.42-52

01/01/2013

DOI: https://doi.org/10.1007/s10762-012-9947-1

PMCID: PMC3607393

PMID: 23539422

Abstract

Gaussian Beam

Gyrotron

Frequency Tunable

Waveguide

Double Disk Window

In this paper, we describe the design and experimental results from the rebuild of a 250 GHz gyrotron used for Dynamic Nuclear Polarization enhanced Nuclear Magnetic Resonance spectroscopy on a 380 MHz spectrometer. Tuning bandwidth of approximately 2 GHz is easily achieved at a fixed magnetic field of 9.24 T and a beam current of 95 mA producing an average output power of >10 W over the entire tuning band. This tube incorporates a double disk output sapphire window in order to maximize the transmission at 250.58 GHz. DNP Signal enhancement of >125 is achieved on a 13 C-Urea sample using this gyrotron.

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

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Title: Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy
Creators: Sudheer Jawla - Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Qing Zhe Ni - Francis Bitter Magnet Lab and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Alexander Barnes - Francis Bitter Magnet Lab and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
William Guss - Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Eugenio Daviso - Francis Bitter Magnet Lab and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Judith Herzfeld - Department of Chemistry, Brandies University, Waltham, MA-02454, USA
Robert Griffin - Francis Bitter Magnet Lab and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Richard Temkin - Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA-02139, USA
Publication Details: Journal of infrared, millimeter and terahertz waves, Vol.34(1), pp.42-52
Grant note: R01 EB004866 || EB / National Institute of Biomedical Imaging and Bioengineering : NIBIB
Identifiers: 9923972910501921
Academic Unit: Department of Chemistry
Language: English
Resource Type: Journal article

Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy

Abstract

UN Sustainable Development Goals (SDGs)

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