Widths and shifts of argon-II lines in a pulsed arc

1968 ◽  
Vol 46 (9) ◽  
pp. 1083-1086 ◽  
Author(s):  
A. J. Barnard ◽  
H. G. James ◽  
C. R. Neufeld
Keyword(s):  
Exposure Time ◽  
High Density ◽  
The Other ◽  
Arc Plasma ◽  
And Shifts ◽  
Pulsed Arc

The spectrum of a high-density arc plasma was photographed with a 15 μs exposure time. The widths and shifts of 17 Ar-II lines were measured. While most lines have small blue shifts, the 4104 and 4278 Å lines have substantial red shifts. These two lines are also twice as wide as the other lines.

An innovative high-power constant-current pulsed-arc power-supply for a high-density pulsed-arc-plasma ion-source using a LaB6-filament

2010 ◽  
Vol 81 (2) ◽  
pp. 02A718 ◽  
Author(s):  
A. Ueno ◽  
H. Oguri ◽  
K. Ikegami ◽  
Y. Namekawa ◽  
K. Ohkoshi ◽  
...  
Keyword(s):  
High Power ◽  
Power Supply ◽  
Ion Source ◽  
High Density ◽  
Constant Current ◽  
Arc Plasma ◽  
Arc Power ◽  
Plasma Ion Source ◽  
Pulsed Arc

FIELD STRENGTH IN PULSED MERCURY ARCS

1965 ◽  
Vol 43 (4) ◽  
pp. 670-675 ◽  
Author(s):  
B. Ahlborn ◽  
A. J. Barnard ◽  
H. D. Campbell
Keyword(s):  
Field Strength ◽  
Mercury Vapor ◽  
Average Field ◽  
Arc Plasma ◽  
Cathode Fall ◽  
Arc Current ◽  
Mercury Electrodes ◽  
The Relationship ◽  
Pulsed Arc ◽  
Arc Current And Voltage

In a pulsed arc with mercury electrodes the average column field strength Eco was measured for different currents I, and the relationship [Formula: see text] was found. The variations of arc current and voltage with time indicate that the anode and cathode fall regions have a combined thickness of 3 × 10−6 cm, and an average field strength of 2 × 106 V/cm. The arc plasma is formed mainly from mercury vapor, rather than from the surrounding gas.

RADIATION EXPOSURE TO THE BACK WITH DIFFERENT TYPES OF APRONS

2021 ◽  
Author(s):  
Seung Wan Hong ◽  
Tae Won Kim ◽  
Jae Hun Kim
Keyword(s):  
Radiation Exposure ◽  
Effective Dose ◽  
Exposure Time ◽  
The Other ◽  
Lead Apron ◽  
Type Group ◽  
Air Kerma ◽  
Different Types ◽  
The Relationship

Abstract Physicians and nurses stand with their back towards the C-arm fluoroscope when using the computer, taking things out of closets and preparing drugs for injection or instruments for intervention. This study was conducted to investigate the relationship between the type of lead apron and radiation exposure to the backs of physicians and nurses while using C-arm fluoroscopy. We compared radiation exposure to the back in the three groups: no lead apron (group C), front coverage type (group F) and wrap-around type (group W). The other wrap-around type apron was put on the bed instead of on a patient. We ran C-arm fluoroscopy 40 times for each measurement. We collected the air kerma (AK), exposure time (ET) and effective dose (ED) of the bedside table, upper part and lower part of apron. We measured these variables 30 times for each location. In group F, ED of the upper part was the highest (p < 0.001). ED of the lower part in group C and F was higher than that in group W (p = 0.012). The radiation exposure with a front coverage type apron is higher than that of the wrap-around type and even no apron at the neck or thyroid. For reducing radiation exposure to the back of physician or nurse, the wrap-around type apron is recommended. This type of apron can reduce radiation to the back when the physician turns away from the patient or C-arm fluoroscopy.

scholarly journals High-Coercivity Fe-Co Nanoparticles Prepared by Pulsed Arc Plasma Deposition

2016 ◽  
Vol 57 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Daiki Horiyama ◽  
Masashi Matsuura ◽  
Tetsuro Yamamoto ◽  
Nobuki Tezuka ◽  
Satoshi Sugimoto
Keyword(s):  
Plasma Deposition ◽  
High Coercivity ◽  
Arc Plasma ◽  
Co Nanoparticles ◽  
Pulsed Arc

Predictions of Current Attachment at Thermionic Cathode for TIG Arcs

2008 ◽  
Vol 580-582 ◽  
pp. 319-322 ◽  
Author(s):  
Manabu Tanaka ◽  
Kentaro Yamamoto ◽  
Tashiro Shinichi ◽  
John J. Lowke
Keyword(s):  
Melting Point ◽  
Work Function ◽  
Atmospheric Pressure ◽  
The Other ◽  
Numerical Calculations ◽  
Maximum Temperature ◽  
Arc Plasma ◽  
Melting Points ◽  
Thermionic Cathode ◽  
Uniform Current

Study of current attachment at thermionic cathode for TIG arc at atmospheric pressure is attempted from numerical calculations of arc-electrodes unified model. The calculations show that the maximum temperature of arc plasma close to the cathode tip for W-2% ThO2 reaches 19,000 K and it is the highest value in comparison with the other temperatures for W-2% La2O3 and W-2% CeO2, because the current attachment at the cathode tip is constricted by a centralized limitation of liquid area of ThO2 due to its higher melting point. The calculations also show that, in cases of W- 2% La2O3 and W-2% CeO2, the liquid areas of La2O3 and Ce2O3 are widely expanded at the cathode tip due to their lower melting points and then produce uniform current attachments at the cathode. It is concluded that the current attachment at thermionic cathode is strongly dependent on work function, melting point and Richardson constant of emitter materials.

Thermal Evolution of the Structure and Activity of Rh Overlayer Catalysts Prepared by Pulsed Arc-Plasma Deposition

2017 ◽  
Vol 60 (12-14) ◽  
pp. 955-961 ◽  
Author(s):  
Satoshi Misumi ◽  
Hiroshi Yoshida ◽  
Akinori Matsumoto ◽  
Satoshi Hinokuma ◽  
Tetsuya Sato ◽  
...  
Keyword(s):  
Thermal Evolution ◽  
Plasma Deposition ◽  
Arc Plasma ◽  
Pulsed Arc ◽  
Structure And Activity

scholarly journals Measured Stark widths and shifts in the O IV spectrum

2003 ◽  
pp. 51-54 ◽  
Author(s):  
Stevan Djenize ◽  
Aleksandar Sreckovic ◽  
Srdjan Bukvic ◽  
Slobodanka Kalezic
Keyword(s):  
Arc Discharge ◽  
Theoretical Data ◽  
Plasma Source ◽  
Spectral Lines ◽  
Pulsed Arc Discharge ◽  
D Values ◽  
And Shifts ◽  
Pulsed Arc ◽  
Good Agreement ◽  
Thin Plasma

Stark widths (W) and shifts (d) of 5 prominent triply ionized oxygen (O IV) spectral lines in 3 multiplets have been measured in oxygen plasma at 42 000 K electron temperature using a linear, low-pressure, pulsed arc discharge as an optically thin plasma source. Obtained W and d values have been compared to available experimental and theoretical data. We found a good agreement among our experimental W and d values and theoretical expectations.

scholarly journals „Es war kein Job, es war eine Berufung“ – Gouvernementale Führung, fragmentierte Subjekte und <i>contre-conduite</i> in der nichtstaatlichen Entwicklungspraxis

2019 ◽  
Vol 74 (2) ◽  
pp. 167-181
Author(s):  
Kirsten Linnemann
Keyword(s):  
Critical Distance ◽  
The Self ◽  
The Other ◽  
Self And Other ◽  
Development Professionals ◽  
Western Values ◽  
The One ◽  
And Shifts ◽  
Good Cause ◽  
Development Practice

Abstract. With their donation appeals aid organisations procure a polarised worldview of the self and other into our everyday lives and feed on discourses of “development” and “neediness”. This study investigates how the discourse of “development” is embedded in the subjectivities of “development” professionals. By approaching the topic from a governmentality perspective, the paper illustrates how “development” is (re-)produced through internalised Western values and powerful mechanisms of self-conduct. Meanwhile, this form of self-conduct, which is related to a “good cause”, also gives rise to doubts regarding the work, as well as fragmentations and shifts of identity. On the one hand, the paper outlines various coping strategies used by development professionals to maintain a coherent narrative about the self. On the other hand, it also shows how doubts and fragmentations of identity can generate a critical distance to “development” practice, providing a space for resistant and transformative practice in the sense of Foucauldian counter-conduct.

Pleasingness vs Interestingness of Visual Stimuli with Controlled Complexity: Their Relationship to Looking Time as a Function of Exposure Time

1975 ◽  
Vol 40 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Gerda Smets
Keyword(s):  
Exposure Time ◽  
Binocular Rivalry ◽  
Stimulus Pair ◽  
Significant Interaction ◽  
Visual Stimuli ◽  
The Other ◽  
Stimulus Complexity

Ss take more time to perceive interesting/displeasing stimuli than uninteresting/pleasing ones. This is consistent with the results of former experiments. However we used a different operationalization of looking time, based on binocular rivalry. Each of six stimulus pairs was presented in a stereoscope. One member of each pair was interesting but displeasing in comparison to the other member. Stimulus complexity was under control. Due to binocular rivalry Ss perceived only one pattern a time. 20 Ss were asked to indicate which pattern they actually saw by pushing two buttons. For each stimulus pair was registered how long each button was pushed during each of six successive minutes. Unlike other operationalizations this one is less dependent on S's determination of what stimulus will be looked at or for how long. It has the advantage that it is bound up more exclusively with relations of similarity and dissimilarity between stimulus elements. It allows manipulation of exposure time in a systematic and continuous way. There is no significant interaction between looking and exposure time.

The Palestine Question: From the Balfour Declaration to the Deal of the Century

2021 ◽  
Author(s):  
Honaida Ghanim
Keyword(s):  
Settler Colonialism ◽  
The State ◽  
The Other ◽  
Indigenous Resistance ◽  
The Creation ◽  
The One ◽  
And Shifts ◽  
State Of Israel ◽  
Palestinian Question

The colonial framework introduced a central perspective into Palestinian studies in the context of addressing Zionism, Zionist relations with the Palestinian entity, and the creation of the question of Palestine. This chapter explores the rise and shifts of the Palestinian question from the Balfour Declaration to the “deal of the century.” Informed by a sociohistorical approach, the chapter goes through historical shifts and analyzes the Palestine question within relations of interplay and entanglement with the Zionist project and, later, with the state of Israel. It focuses on the sociological dimensions of the Palestine question at the intersection of settler colonialism, theology, and state-making, on the one hand, and indigenous resistance, national struggle, and pragmatism, on the other.

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