Space propulsion research vacuum facility of the Bogazici University space technologies laboratory

Korkmaz, Oguz; Jahanbakhsh, Sina; Çelik, Murat

doi:10.1109/rast.2015.7208420

Cited by 8 publications

(6 citation statements)

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“…BUSTLab vacuum facility (Korkmaz 2015) is used for the experiments. The vacuum chamber has a diameter of 1.5 m and a length of 2.7 m. Vacuum level on the order of 3 × 10 −6 Torr is reached with the use of two 12 inch cryopumps without any gas flow to the chamber.…”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation of the Electrical Wiring Configuration of the HK40 Hall Thruster Operation

Kokal,

Turan,

Celik

2023

J. Aerosp. Technol. Manag.

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Vacuum chambers providing a low pressure environment similar to the vacuum environment in low earth orbit have been used for the testing of plasma thrusters. A significant proportion of research on the effects of vacuum facility on plasma thrusters has focused on the effects of background pressure and plume expansion; however, the electrical interaction of the conductive chamber walls with the plasma thrusters needs to be explored further. In this study, the operation of a prototype Hall thruster, HK40, was investigated to understand the effects of wiring configuration of the thruster-cathode-chamber system. During the tests, the thruster was operated in two different grounding configurations. A resistance analogy regarding the changes in the electrical potentials and measured currents was introduced. The calculated thrust and efficiency values of the two configurations were compared. This study shows that the current extracted from the emitter surface of the cathode, along with the cathode-toground voltage can be used to estimate the thrust and thruster efficiency. In addition, the theoretical predictions were compared with the values based on the measurements made with an in-house-built inverted pendulum type thrust stand. The presented results show that the thrust and efficiency values are predicted with 3.4% and 8.3% uncertainty, respectively.

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Section: Methodsmentioning

confidence: 99%

Experimental Investigation of the Electrical Wiring Configuration of the HK40 Hall Thruster Operation

Kokal,

Turan,

Celik

2023

J. Aerosp. Technol. Manag.

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“…The thrust measurements of the BUSTLab MET prototype are conducted inside the BUSTLab vacuum chamber, which is 1.5 m in diameter and 2.7 m in length. 12…”

Section: Methodsmentioning

confidence: 99%

Preliminary Thrust Measurement Results of the BUSTLab Microwave Electrothermal Thruster

Yildiz¹,

Kokal²,

Çelik³

2017

53rd AIAA/SAE/ASEE Joint Propulsion Conference

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In a microwave electrothermal thruster (MET), microwave energy is used to heat the propellant gas using a free floating plasma generated inside a resonant cavity. The heated gas is then expanded through a converging-diverging nozzle and thrust is produced. Microwave electrothermal thrusters are able to produce a few mN to a few hundred mN levels depending on the size and the power levels of the thruster. A prototype microwave electrothermal thruster is designed, manufactured and tested at Bogazici University Space Technologies Laboratory (BUSTLab). This thruster operates at 2.45 GHz frequency. In this paper we present the preliminary thrust measurements of the BUSTLab MET system running on Argon gas for a power level of 200 W .

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“…Its official name is "Cumhuriyet Caddesi", but those who live in the city know the place as "Bullshit". Rumor has it that the street was named "Bullshit Square" because those interested in politics walked there chattering about how to save the world (Korkmaz 2017). This ironic adjective shows the extent to which Tuncelians find daily life with politics.…”

Section: Bullshit Squarementioning

confidence: 99%

The Square as a Reflection of Urban Identity: The Example of Palavra Square

Demir

2023

SSRN Journal

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Space propulsion research vacuum facility of the Bogazici University space technologies laboratory

Cited by 8 publications

References 0 publications

Experimental Investigation of the Electrical Wiring Configuration of the HK40 Hall Thruster Operation

Experimental Investigation of the Electrical Wiring Configuration of the HK40 Hall Thruster Operation

Preliminary Thrust Measurement Results of the BUSTLab Microwave Electrothermal Thruster

The Square as a Reflection of Urban Identity: The Example of Palavra Square

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