Self-consistent formation and steady-state characterisation of trapped high energy electron clouds in the presence of a neutral gas background

Fuente: arXiv

Enregistré dans:

Détails bibliographiques
Auteurs principaux:	Bars, G. Le, Hogge, J. -Ph., Loizu, J., Alberti, S., Romano, F., Cerfon, A.
Format:	Preprint
Publié:	2022
Sujets:	Plasma Physics
Accès en ligne:	Acceder al recurso
Tags:	Ajouter un tag Pas de tags, Soyez le premier à ajouter un tag!

Documents similaires

The Diocotron Instability in the Trapped Electrons Experiment T-REX and its Relevance to Electron Clouds in Gyrotron Guns
par: Romano, Francesco, et autres
Publié: (2026)

Design and First Tests of the Trapped Electrons Experiment T-REX
par: Romano, Francesco, et autres
Publié: (2024)

Observation and characterisation of trapped electron modes in Wendelstein 7-X
par: Krämer-Flecken, A., et autres
Publié: (2024)

Simplified and Flexible Coils for Stellarators using Single-Stage Optimization
par: Jorge, R., et autres
Publié: (2024)

Self-consistent modelling and qualitative comparison of mildly relativistic runaway electron dynamics with a closed flux surface formation model during tokamak startup
par: Lee, Y., et autres
Publié: (2026)

Ion-neutral and neutral-neutral scattering in argon at KeV energies and implications for high-aspect-ratio etching
par: Khrabrov, Alexander V., et autres
Publié: (2026)

Direct, simple, and efficient computation of all components of the virtual-casing magnetic field in axisymmetric geometries with Kapur-Rokhlin quadrature
par: Toler, Evan, et autres
Publié: (2024)

Charge-exchange measurements of high-energy fast ions in LHD using negative-ion neutral beam injection
par: Hayashi, W. H. J., et autres
Publié: (2024)

Efficient calculation of magnetic fields from ferromagnetic materials near strong electromagnets, and application to stellarator coil optimization
par: Landreman, Matt, et autres
Publié: (2025)

Magnetic shear effects on ballooning turbulence in the boundary of fusion devices
par: Tecchiolli, Z., et autres
Publié: (2025)

Characterisation of X- and O-points in Wendelstein 7-X with respect to coil currents
par: Davies, Robert, et autres
Publié: (2025)

Influence of collisions on trapped-electron modes in tokamaks and low-shear stellarators
par: Morren, M. C. L., et autres
Publié: (2024)

Efficient single-stage optimization of islands in finite-$β$ stellarator equilibria
par: Smiet, Christopher Berg, et autres
Publié: (2024)

Turnstile area as a measure for chaotic transport in magnetic confinement fusion devices
par: Smiet, Christopher Berg, et autres
Publié: (2025)

On the effect of flux-surface shaping on trapped-electron modes in quasi-helically symmetric stellarators
par: Gerard, M. J., et autres
Publié: (2024)

Photodiode based multi-modal diagnostic for low-energy neutral beam injection in the LTX-$β$ spherical tokamak
par: Maan, A., et autres
Publié: (2026)

On turbulent magnetic reconnection: fast and slow mean steady-states
par: Stanish, Sage, et autres
Publié: (2024)

Stationary striations in plasma, created by a short microwave pulse in a waveguide filled with a neutral gas
par: Bliokh, Y., et autres
Publié: (2023)

Collisionless ion-electron energy exchange in magnetized shocks
par: Zhang, Y., et autres
Publié: (2025)

Sawtooth crash in tokamak as a sequence of Multi-region Relaxed MHD equilibria
par: Qu, Zhisong, et autres
Publié: (2025)

Prospects of negative triangularity tokamak for advanced steady-state confinement of fusion plasmas
par: Zheng, Linjin, et autres
Publié: (2024)

Bayesian optimization of electron energy from laser wakefield accelerators
par: Valenta, P., et autres
Publié: (2025)

Single-mode laser guiding in non-parabolic plasma channels for high-energy electron acceleration
par: Lécz, Zsolt, et autres
Publié: (2024)

Effect of front surface engineering on high energy electron, X-ray and heavy ion generation from Relativistic laser interaction with thick high-Z targets
par: Twardowski, J., et autres
Publié: (2026)

Control of pedestal-top electron density using RMP and gas puff at KSTAR
par: Kim, Minseok, et autres
Publié: (2025)

Radiative depolarization of high-energy electron beams in wakefield accelerators
par: Mathiak, Oliver, et autres
Publié: (2026)

Constructing nested coordinates inside strongly shaped toroids using an action principle
par: Tecchiolli, Zeno, et autres
Publié: (2024)

Direct prediction of saturated neoclassical tearing modes in slab using an equilibrium approach
par: Balkovic, Erol, et autres
Publié: (2024)

A quasi-neutral electromagnetic hybrid model with drift-kinetic electrons and fully kinetic ions
par: Meng, Guo, et autres
Publié: (2026)

An electron-beam based Compton scattering x-ray source for probing high-energy-density physics
par: Rinderknecht, H. G., et autres
Publié: (2022)

Jet formation model from accretion disks of electron-ion-photon gas
par: Katsadze, E., et autres
Publié: (2024)

Design of experiments characterising heat conduction in magnetised, weakly collisional plasma
par: Vincent, T. A., et autres
Publié: (2026)

Plasma pressure response to non-inductive current drive in axisymmetric visco-resistive MHD steady-states
par: Krupka, Anna, et autres
Publié: (2025)

A study of the electronic and ionic structure, for competing states of fully and partially ionized hydrogen, using the neutral pseudo-atom method as well as a classical map for the electron subsystem
par: Dharma-wardana, M. W. C.
Publié: (2025)

Autoresonant laser acceleration of electrons in a strongly magnetized plasma solenoid
par: Gagarin, Iu, et autres
Publié: (2024)

Self‐organization of plasma edge turbulence in interaction with recycling neutrals
par: V. Quadri, et autres
Publié: (2024)

Runaway electron beam formation, vertical motion, termination and wall loads in EU-DEMO
par: Vannini, F., et autres
Publié: (2024)

Structure of pressure-gradient-driven current singularity in ideal magnetohydrodynamic equilibrium
par: Huang, Yi-Min, et autres
Publié: (2023)

The impact of electron inertia on collisional laser absorption for high energy density plasmas
par: Young, James R., et autres
Publié: (2023)

A scaling law of the neutral opacity and Balmer-$α$ wing shape in high-temperature plasmas
par: Fujii, Keisuke, et autres
Publié: (2024)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
ui	"standard"
language	"fr"
VUFIND_SESSION	"2d78db941e90c22ca322bd60c2a2e979"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1790854485.6775 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "2d78db941e90c22ca322bd60c2a2e979" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1433}
SessionHelper	Laminas\Stdlib\ArrayObject {#1759}

Server/Request Data

Key	Value
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"ui=standard; language=fr; VUFIND_SESSION=2d78db941e90c22ca322bd60c2a2e979"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
SERVER_ADDR	"200.23.222.19"
SERVER_PORT	"443"
REMOTE_ADDR	"216.73.216.147"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"37405"
REDIRECT_URL	""" /Record/\n arxiv_https___arxiv_org_abs_2206_14662/Similar """
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/%0Aarxiv_https___arxiv_org_abs_2206_14662/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1790854485.672
REQUEST_TIME	1790854485

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler