Category Archives: Conference Abstract

Opportunities and Challenges for EIK’s in DNP NMR Applications #DNPNMR

Rosay, Melanie, Ivan Scrgeyev, Leo Tometich, Christopher Hickey, Albert Roitman, Doug Yake, and Dave Berry. “Opportunities and Challenges for EIK’s in DNP NMR Applications.” In 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 1–2. Nagoya: IEEE, 2018.

https://doi.org/10.1109/IRMMW-THz.2018.8510328

Modern Dynamic Nuclear Polarization (DNP) experiments often utilize gyrotron sources for irradiation of electron spins at 140-593 GHz. The total cost of ownership, size, and complexity of gyrotrons, however, limits wider adoption. The introduction of lower-cost and more compact sources can have a significant impact on the DNP community. This contribution describes the development of a 263 GHz EIK, design of transmission line for optimal irradiation of the DNP NMR sample, and detailed performance characterization for DNP experiments.

High power Continuously Frequency-tunable Terahertz Radiation Sources and Transmission Lines for DNP-enhanced NMR System #DNPNMR

Liu, Diwei, Tao Song, Hao Shen, Jie Huang, Ning Zhang, Chenghai Wang, Wei Wang, and Shenggang Liu. “High Power Continuously Frequency-Tunable Terahertz Radiation Sources and Transmission Lines for DNP-Enhanced NMR System.” In 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 1–2. Nagoya: IEEE, 2018. 

https://doi.org/10.1109/IRMMW-THz.2018.8510299

The effect of the electron beam quality of a 250GHz continuously frequency-tunable gyrotron used for Dynamic Nuclear Polarization enhanced Nuclear Magnetic Resonance is tuned by changing the operating voltage V0 or the operating magnetic field B0 on the operating frequency and the beam-wave interaction efficiency is investigated. Meanwhile, an improved transmission and mirror system with a well-focused Gaussian-like output beam is designed to match the DNP-NMR sample.

Manufacturing of a 263 GHz continuously tunable gyrotron

Rozier, Y., et al. Manufacturing of a 263 GHz continuously tunable gyrotron. in Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International. 2013.

http://dx.doi.org/10.1109/IVEC.2013.6571071

A 263 GHz gyrotron dedicated to Dynamic Nuclear Polarization (DNP) enhanced Nuclear Magnetic Resonance (NMR) spectroscopy has been designed by EPFL and manufactured by Thales. With this device, we have demonstrated an output power up to 160 W in continuous wave. Design and main experimental results are discussed in this paper.

Manufacturing of a 263 GHz continuously tunable gyrotron

Rozier, Y., et al. Manufacturing of a 263 GHz continuously tunable gyrotron. in Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International. 2013.

http://dx.doi.org/10.1109/IVEC.2013.6571071

A 263 GHz gyrotron dedicated to Dynamic Nuclear Polarization (DNP) enhanced Nuclear Magnetic Resonance (NMR) spectroscopy has been designed by EPFL and manufactured by Thales. With this device, we have demonstrated an output power up to 160 W in continuous wave. Design and main experimental results are discussed in this paper.

First tests of a 527 GHz gyrotron for dynamic nuclear polarization

Felch, K., et al. First tests of a 527 GHz gyrotron for dynamic nuclear polarization. in Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International. 2013.

http://dx.doi.org/10.1109/IVEC.2013.6571048

A gyrotron operating at the second cyclotron harmonic in a magnetic field of 9.7 T has produced a CW output power of 25 W at 527 GHz. The gyrotron is now being employed in Dynamic Nuclear Polarization (DNP) Applications. The gyrotron design and results of the tests are presented.

First tests of a 527 GHz gyrotron for dynamic nuclear polarization

Felch, K., et al. First tests of a 527 GHz gyrotron for dynamic nuclear polarization. in Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International. 2013.

http://dx.doi.org/10.1109/IVEC.2013.6571048

A gyrotron operating at the second cyclotron harmonic in a magnetic field of 9.7 T has produced a CW output power of 25 W at 527 GHz. The gyrotron is now being employed in Dynamic Nuclear Polarization (DNP) Applications. The gyrotron design and results of the tests are presented.

DNP at ENC

With ENC just around the corner the full conference program is now available at:

http://www.enc-conference.org/Conference/Program/tabid/63/Default.aspx

This year DNP-NMR spectroscopy has its own parallel session (Monday, 4:00 – 5:50pm, Chapel), with talks by Shahin Pourrahimir, David Doty, Robert Meier, Emilio Nanni, Melanie Rosay and Songi Han and a plenary session (Wednesday, 8:30 – 10:10 am, Merill Hall) with contributions by Maja Cassidy, Sami Jannin, Gunnar Jeschke, Kent Thurber and Joshua Wand.

Besides that there are several more DNP related talks by Loren Andreas in the Biomolecular Structure and Function session (Wednesday 10:45 – 12:20pm, Merril Hall) and by Hartmut Oschkinat in the Frontiers session (Thursday, 4:00 – 5:50pm, Merril Hall).

So far in total 23 posters are dedicated to the topic of DNP-NMR (section PE). You can find all poser abstracts at:

http://bit.ly/ZwzLgu

DNP at ENC

With ENC just around the corner the full conference program is now available at:

http://www.enc-conference.org/Conference/Program/tabid/63/Default.aspx

This year DNP-NMR spectroscopy has its own parallel session (Monday, 4:00 – 5:50pm, Chapel), with talks by Shahin Pourrahimir, David Doty, Robert Meier, Emilio Nanni, Melanie Rosay and Songi Han and a plenary session (Wednesday, 8:30 – 10:10 am, Merill Hall) with contributions by Maja Cassidy, Sami Jannin, Gunnar Jeschke, Kent Thurber and Joshua Wand.

Besides that there are several more DNP related talks by Loren Andreas in the Biomolecular Structure and Function session (Wednesday 10:45 – 12:20pm, Merril Hall) and by Hartmut Oschkinat in the Frontiers session (Thursday, 4:00 – 5:50pm, Merril Hall).

So far in total 23 posters are dedicated to the topic of DNP-NMR (section PE). You can find all poser abstracts at:

http://bit.ly/ZwzLgu

High power THz technologies using high frequency gyrotrons

Idehara, T., et al. High power THz technologies using high frequency gyrotrons. in Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on. 2012.

http://dx.doi.org/10.1109/IRMMW-THz.2012.6380408

Gyrotrons are extremely high power radiation sources even in THz frequency region comparing conventional radiation sources. We have developed gyrotron FU CW series for application to many high power THz technologies. Up to the present, nine CW gyrotrons were developed. Each gyrotron has its own objective and was optimized for respective application subject. Now, the applications are extended to wide fields including DNP-NMR measurement, ESR echo experiment, direct and precise measurement on hyperfine structure of positronium, experiment on effective operation of Bloch oscillator using semiconductor super lattice, etc. In this paper, we will introduce such high power THz technologies opened by high power THz radiation sources. Gyrotrons.

High power THz technologies using high frequency gyrotrons

Idehara, T., et al. High power THz technologies using high frequency gyrotrons. in Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on. 2012.

http://dx.doi.org/10.1109/IRMMW-THz.2012.6380408

Gyrotrons are extremely high power radiation sources even in THz frequency region comparing conventional radiation sources. We have developed gyrotron FU CW series for application to many high power THz technologies. Up to the present, nine CW gyrotrons were developed. Each gyrotron has its own objective and was optimized for respective application subject. Now, the applications are extended to wide fields including DNP-NMR measurement, ESR echo experiment, direct and precise measurement on hyperfine structure of positronium, experiment on effective operation of Bloch oscillator using semiconductor super lattice, etc. In this paper, we will introduce such high power THz technologies opened by high power THz radiation sources. Gyrotrons.

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