The Helically Symmetric eXperiment (HSX) Thomson Scattering (TS) diagnostic is being upgraded to decrease uncertainty in electron temperature and density measurements. Upgrades to the HSX TS diagnostic will consist of a novel redesign of polychromator electronics and digitization of the TS output signal. Here, we also present a study of the benefits of an additional spectral channel that will sample the red-shifted band of the scattered spectrum. To maximize system bandwidth (BW) and gain, while minimizing noise, the existing low-BW polychromator electronics on HSX will be replaced by high-BW, high gain circuitry designed in-house.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/5.0101879 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Helical Quintulene: Synthesis, Chirality, and Supramolecular Assembly.
Angew Chem Int Ed Engl
January 2025
Xiamen University, Department of Chemistry, Siminnan Road 422, 361005, Xiamen, CHINA.
Quintulene is a quintuply symmetrical cycloarene with a positively curved molecular geometry. First described by Staab and Sauer in 1984, its successful synthesis was not achieved until 2020. Due to the challenges posed by its positive curvature, structural extensions of quintulene have been studied rarely.
View Article and Find Full Text PDFSym- and Asym-Expanded Heterohelicene Isomers Featuring Extended Multi-Resonance Skeleton for Narrowband Deep-Blue Fluorescence.
Angew Chem Int Ed Engl
January 2025
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Expanded heterohelicenes composed of alternating linearly and angularly fused multi-resonance (MR) skeletons have gained wide interest owing to their promising narrowband emissions. Herein, a pair of sym- and asym-expanded heterohelicene isomers was obtained by merging boron/oxygen (B/O)-embedded MR triangulene and indolo[3,2,1-jk]carbazole units via one-pot synthesis. Owing to their fully resonating extended helical skeleton, the target heterohelicenes exhibit a significantly narrowed spectra bandwidth while emission red-shifting, thus affording deep-blue narrowband emission with a peak at approximately 460 nm, full-width-at-half-maximum (FWHM) of only 18 nm, and near-unity photoluminescence quantum yields.
View Article and Find Full Text PDFFunctional Roles of the Charged Residues of the C- and M-Gates in the Yeast Mitochondrial NAD Transporter Ndt1p.
Int J Mol Sci
December 2024
Department of Biosciences, Biotechnology and Environment, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy.
Mitochondrial carriers transport organic acids, amino acids, nucleotides and cofactors across the mitochondrial inner membrane. These transporters consist of a three-fold symmetric bundle of six transmembrane α-helices that encircle a pore with a central substrate binding site, whose alternating access is controlled by a cytoplasmic and a matrix gate (C- and M-gates). The C- and M-gates close by forming two different salt-bridge networks involving the conserved motifs [YF][DE]XX[KR] on the even-numbered and PX[DE]XX[KR] on the odd-numbered transmembrane α-helices, respectively.
View Article and Find Full Text PDFBottom-up design of calcium channels from defined selectivity filter geometry.
bioRxiv
December 2024
Department of Biochemistry, University of Washington, Seattle, WA, USA.
Native ion channels play key roles in biological systems, and engineered versions are widely used as chemogenetic tools and in sensing devices. Protein design has been harnessed to generate pore-containing transmembrane proteins, but the capability to design ion selectivity based on the interactions between ions and selectivity filter residues, a crucial feature of native ion channels, has been constrained by the lack of methods to place the metal-coordinating residues with atomic-level precision. Here we describe a bottom-up RFdiffusion-based approach to construct Ca channels from defined selectivity filter residue geometries, and use this approach to design symmetric oligomeric channels with Ca selectivity filters having different coordination numbers and different geometries at the entrance of a wide pore buttressed by multiple transmembrane helices.
View Article and Find Full Text PDFMapping the local ambidextrous chirality in thin films of N phase by circular dichroism spectra.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Department of Chemistry, University of Hull, Hull HU6 7RX, UK. Electronic address:
Circular dichroism mapping (CDM) method was introduced by utilizing the highly collimated light beam of synchrotron radiation (SR) available at Diamond Light Source B23 beamline for scanning the thin films of the N phase. We apply SR-CDM to two achiral dimeric materials exhibiting the N phase: symmetric DTC5C9 and dissymmetric DTC5C9CB. The SR-CDM measurements directly capture the chiral information in the local N domains, providing the ultimate complement to the theoretical predictions of the helical structures: the spontaneous symmetry breaking in N phase is ambidextrous.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!