Literature DB >> 23539422

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

Sudheer Jawla1, Qing Zhe Ni, Alexander Barnes, William Guss, Eugenio Daviso, Judith Herzfeld, Robert Griffin, Richard Temkin.   

Abstract

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 13C-Urea sample using this gyrotron.

Entities:  

Keywords:  Double Disk Window; Frequency Tunable; Gaussian Beam; Gyrotron; Waveguide

Year:  2012        PMID： 23539422      PMCID： PMC3607393          DOI： 10.1007/s10762-012-9947-1

Source DB:  PubMed          Journal:  J Infrared Millim Terahertz Waves        ISSN： 1866-6892            Impact factor:   1.768


  32 in total

1.  Transmembrane domain of M2 protein from influenza A virus studied by solid-state (15)N polarization inversion spin exchange at magic angle NMR.

Authors:  Z Song; F A Kovacs; J Wang; J K Denny; S C Shekar; J R Quine; T A Cross
Journal:  Biophys J       Date:  2000-08       Impact factor: 4.033

2.  Resolution and polarization distribution in cryogenic DNP/MAS experiments.

Authors:  Alexander B Barnes; Björn Corzilius; Melody L Mak-Jurkauskas; Loren B Andreas; Vikram S Bajaj; Yoh Matsuki; Marina L Belenky; Johan Lugtenburg; Jagadishwar R Sirigiri; Richard J Temkin; Judith Herzfeld; Robert G Griffin
Journal:  Phys Chem Chem Phys       Date:  2010-05-08       Impact factor: 3.676

3.  High-resolution molecular structure of a peptide in an amyloid fibril determined by magic angle spinning NMR spectroscopy.

Authors:  Christopher P Jaroniec; Cait E MacPhee; Vikram S Bajaj; Michael T McMahon; Christopher M Dobson; Robert G Griffin
Journal:  Proc Natl Acad Sci U S A       Date:  2004-01-08       Impact factor: 11.205

4.  Dynamic nuclear polarization with a cyclotron resonance maser at 5 T.

Authors: 
Journal:  Phys Rev Lett       Date:  1993-11-22       Impact factor: 9.161

5.  Determination of membrane protein structure by rotational resonance NMR: bacteriorhodopsin.

Authors:  F Creuzet; A McDermott; R Gebhard; K van der Hoef; M B Spijker-Assink; J Herzfeld; J Lugtenburg; M H Levitt; R G Griffin
Journal:  Science       Date:  1991-02-15       Impact factor: 47.728

6.  A 250 GHz gyrotron with a 3 GHz tuning bandwidth for dynamic nuclear polarization.

Authors:  Alexander B Barnes; Emilio A Nanni; Judith Herzfeld; Robert G Griffin; Richard J Temkin
Journal:  J Magn Reson       Date:  2012-03-29       Impact factor: 2.229

7.  Low-Loss Transmission Lines for High-Power Terahertz Radiation.

Authors:  Emilio A Nanni; Sudheer K Jawla; Michael A Shapiro; Paul P Woskov; Richard J Temkin
Journal:  J Infrared Millim Terahertz Waves       Date:  2012-02-01       Impact factor: 1.768

8.  Liquid state DNP using a 260 GHz high power gyrotron.

Authors:  Vasyl Denysenkov; Mark J Prandolini; Marat Gafurov; Deniz Sezer; Burkhard Endeward; Thomas F Prisner
Journal:  Phys Chem Chem Phys       Date:  2010-05-11       Impact factor: 3.676

9.  Continuous-Wave Operation of a Frequency-Tunable 460-GHz Second-Harmonic Gyrotron for Enhanced Nuclear Magnetic Resonance.

Authors:  Antonio C Torrezan; Seong-Tae Han; Ivan Mastovsky; Michael A Shapiro; Jagadishwar R Sirigiri; Richard J Temkin; Robert G Griffin; Alexander B Barnes
Journal:  IEEE Trans Electron Devices       Date:  2010-06-07       Impact factor: 2.917

10.  High-Field Dynamic Nuclear Polarization for Solid and Solution Biological NMR.

Authors:  A B Barnes; G De Paëpe; P C A van der Wel; K-N Hu; C-G Joo; V S Bajaj; M L Mak-Jurkauskas; J R Sirigiri; J Herzfeld; R J Temkin; R G Griffin
Journal:  Appl Magn Reson       Date:  2008-08       Impact factor: 0.831
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  5 in total

1.  Peptide and Protein Dynamics and Low-Temperature/DNP Magic Angle Spinning NMR.

Authors:  Qing Zhe Ni; Evgeny Markhasin; Thach V Can; Björn Corzilius; Kong Ooi Tan; Alexander B Barnes; Eugenio Daviso; Yongchao Su; Judith Herzfeld; Robert G Griffin
Journal:  J Phys Chem B       Date:  2017-05-10       Impact factor: 2.991

2.  Second Harmonic 527-GHz Gyrotron for DNP-NMR: Design and Experimental Results.

Authors:  Sudheer K Jawla; Robert G Griffin; Ivan A Mastovsky; Michael A Shapiro; Richard J Temkin
Journal:  IEEE Trans Electron Devices       Date:  2019-12-10       Impact factor: 2.917

3.  Primary Transfer Step in the Light-Driven Ion Pump Bacteriorhodopsin: An Irreversible U-Turn Revealed by Dynamic Nuclear Polarization-Enhanced Magic Angle Spinning NMR.

Authors:  Qing Zhe Ni; Thach V Can; Eugenio Daviso; Marina Belenky; Robert G Griffin; Judith Herzfeld
Journal:  J Am Chem Soc       Date:  2018-03-12       Impact factor: 15.419

4.  Design and characterization of a W-band system for modulated DNP experiments.

Authors:  Mallory L Guy; Lihuang Zhu; Chandrasekhar Ramanathan
Journal:  J Magn Reson       Date:  2015-10-14       Impact factor: 2.229

5.  Characterization of photonic band resonators for DNP NMR of thin film samples at 7 T magnetic field.

Authors:  Alexander A Nevzorov; Antonin Marek; Sergey Milikisiyants; Alex I Smirnov
Journal:  J Magn Reson       Date:  2020-12-13       Impact factor: 2.229
  5 in total

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