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Silly Sisters
"Silly Sisters" is the second entry in the Alliterative Alphabet Series of everyday stories told in alliterative style: a fun, tongue-twisty way of telling stories designed to pique the interest of young readers, while also encouraging their writing skills. Not only is the story told in alliterative fashion, but amazingly, EVERY WORD of the story starts with the same letter -- S. Each line builds upon the last by adding one additional word. The result is a diamond "shape" poem; a real "gem," you might say, about two silly sisters who like to sing and frolic and be the center of attention -- even if it means waking a slumbering sibling. After all, you can't be the center of attention if no one is paying attention to you! So read along and see which silly sister prevails!
Silly Novels by Lady Novelists
One of the most famous novelists in the English literary canon, the likes of Middlemarch and Silas Marnerare household names, but Eliot’s essays are often overlooked. This collection brings together some of her most important essays and seeks to celebrate her non-fiction writing. In ‘Silly Novels by Lady Novelists’ Eliot states a desire – some few years before her best-known works – to turn her hand to novel-writing, and decries the trivial nature of contemporary writers, setting out a manifesto for good writing. In ‘Woman in France’ she considers the history of women’s writing, and the complications women face in order to write – something Eliot knew much about herself, adopting a male name to publish the work she did not publish anonymously. Taken together, this collection gives a rare and valuable insight into the author’s writing, and shines a light on her pioneering subtle form of feminism. 'As one comes back to [Eliot’s] books after years of absence they pour out, even against our expectation, the same store of energy and heat, so that we want more than anything to idle in the warmth.' — Virginia Woolf
State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021. (KIT Scientific Reports ; 7761)
This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification
Ein Gyrotron wird in magnetisch eingeschlossenen Plasmaexperimenten für Heizung, Stromtrieb, Plasmastabilisierung und Plasmadiagnostik verwendet. In dieser Arbeit wird der erste Entwurf und Bau eines Mehrfrequenz-/Mehrzweck Pre-Prototyp Gyrotrons in koaxialer Technologie vorgestellt, das bei (136)/170/204 GHz mit einer Ausgangsleistung von 2 MW arbeitet. Dies ist der erste Schritt zum Betrieb bei Frequenzen bis zu 240 GHz unter Verwendung der Koaxialhohlraum-Gyrotrontechnologie. - A gyrotron is used in magnetically confined plasma experiments for heating, current drive, plasma stabilization and plasma diagnostics. This work presents the first design and construction of a multi-frequency / multi-purpose coaxial-cavity pre-prototype gyrotron operating at (136)/170/204 GHz with an output power of 2 MW. It is the first step towards operating frequencies up to 240 GHz using the coaxial-cavity gyrotron technology.
Investigations of After Cavity Interaction in Gyrotrons Including the Effect of Non-uniform Magnetic Field
Dynamic after-cavity interaction (ACI) in megawatt-class gyrotrons is investigated that could lead to lower output mode purity and increased level of internal stray radiation. The self-consistent KIT-IHM multi-mode-code SELFT has been modified to extend the simulation domain into the radius up-taper section of the gyrotron cavity where the probability of ACI exists. Studies on four different gyrotron configurations confirm that undesired interactions in the up-taper region can result in additional parasitic oscillations with relative power in the 1%-range.
Pushing the KIT 2 MW Coaxial-Cavity Short-Pulse Gyrotron Towards a DEMO Relevant Design
Magnetic fusion is one approach to generate thermonuclear fusion power in an environmental friendly way. The Electron Cyclotron Resonance Heating is considered as the major concept for startup, heating and control of the fusion plasma. Megawatt-class gyrotrons generate the required microwave power. This work focuses on advanced key components and technologies for a DEMO relevant 2 MW gyrotron. One major focus is on the development of advanced Magnetron Injection Guns. Another focus is on the red
Time-dependent spectrum analysis of high power gyrotrons
In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
