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Investigation of the Impact of Azimuthal Magnetic Field Gradient on the Performance Characteristics and Stability of Hall Effect Thrusters
Investigation of the Impact of Azimuthal Magnetic Field Gradient on the Performance Charac...
Investigation of the Impact of Azimuthal Magnetic Field Gradient on the Performance Characteristics and Stability of Hall Effect Thrusters

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105517
ISBN  
9798263346164
DDC  
500
저자명  
Chhavi.
서명/저자  
Investigation of the Impact of Azimuthal Magnetic Field Gradient on the Performance Characteristics and Stability of Hall Effect Thrusters
발행사항  
[Sl] : Georgia Institute of Technology, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
232 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Walker, Mitchell L.R.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
초록/해제  
요약Hall effect thrusters (HETs) are intended to function with a uniform axisymmetric magnetic field. Imperfections in the manufacturing process and electrical shorts that occur during operation might lead to the formation of non-uniformities in the channel. Azimuthal magnetic field gradients are one type of non-uniformity that can arise in the magnetic field. As a result, it is imperative to comprehend the impact of the non-uniform azimuthal magnetic field gradient on the thruster's performance. This thesis aims to quantify the alteration in thruster performance parameters, including efficiency, stability, and thrust, as a result of introducing an azimuthal magnetic field gradient. In order to achieve this, the thruster is modified to enable independent control of the outer magnetic circuit, which in turn allows the current to be adjusted. A three-dimensional sweep probe instrument was constructed to show how the azimuthal magnetic field gradient affects the thrust vector direction. The research results indicate that the azimuthal magnetic field gradient has the most significant impact on the thruster's stability, leading to increased instability during operation. The thrust and efficiency decrease as the gradient increases, with the thrust experiencing the most negligible impact. The introduction of the gradient is indicative of the thrust vector's deviation from the centerline, which leads to a three-dimensional shift in the thrust vector's position. The research offers a physics-based model to explain the observed trends in thruster performance that result from changes in the plasma parameters.
일반주제명  
Plasma
일반주제명  
Chemical bonds
일반주제명  
Ion beams
일반주제명  
Energy
일반주제명  
Electrons
일반주제명  
Electromagnetism
일반주제명  
Charged particles
일반주제명  
Magnetic fields
일반주제명  
Atomic physics
일반주제명  
Chemistry
일반주제명  
Electromagnetics
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI32309393
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■1001  ▼aChhavi.
■24510▼aInvestigation  of  the  Impact  of  Azimuthal  Magnetic  Field  Gradient  on  the  Performance  Characteristics  and  Stability  of  Hall  Effect  Thrusters
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a232  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Walker,  Mitchell  L.R.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2024.
■520    ▼aHall  effect  thrusters  (HETs)  are  intended  to  function  with  a  uniform  axisymmetric  magnetic  field.  Imperfections  in  the  manufacturing  process  and  electrical  shorts  that  occur  during  operation  might  lead  to  the  formation  of  non-uniformities  in  the  channel.  Azimuthal  magnetic  field  gradients  are  one  type  of  non-uniformity  that  can  arise  in  the  magnetic  field.  As  a  result,  it  is  imperative  to  comprehend  the  impact  of  the  non-uniform  azimuthal  magnetic  field  gradient  on  the  thruster's  performance.  This  thesis  aims  to  quantify  the  alteration  in  thruster  performance  parameters,  including  efficiency,  stability,  and  thrust,  as  a  result  of  introducing  an  azimuthal  magnetic  field  gradient.  In  order  to  achieve  this,  the  thruster  is  modified  to  enable  independent  control  of  the  outer  magnetic  circuit,  which  in  turn  allows  the  current  to  be  adjusted.  A  three-dimensional  sweep  probe  instrument  was  constructed  to  show  how  the  azimuthal  magnetic  field  gradient  affects  the  thrust  vector  direction.  The  research  results  indicate  that  the  azimuthal  magnetic  field  gradient  has  the  most  significant  impact  on  the  thruster's  stability,  leading  to  increased  instability  during  operation.  The  thrust  and  efficiency  decrease  as  the  gradient  increases,  with  the  thrust  experiencing  the  most  negligible  impact.  The  introduction  of  the  gradient  is  indicative  of  the  thrust  vector's  deviation  from  the  centerline,  which  leads  to  a  three-dimensional  shift  in  the  thrust  vector's  position.  The  research  offers  a  physics-based  model  to  explain  the  observed  trends  in  thruster  performance  that  result  from  changes  in  the  plasma  parameters.
■590    ▼aSchool  code:  0078.
■650  4▼aPlasma
■650  4▼aChemical  bonds
■650  4▼aIon  beams
■650  4▼aEnergy
■650  4▼aElectrons
■650  4▼aElectromagnetism
■650  4▼aCharged  particles
■650  4▼aMagnetic  fields
■650  4▼aAtomic  physics
■650  4▼aChemistry
■650  4▼aElectromagnetics
■690    ▼a0791
■690    ▼a0748
■690    ▼a0485
■690    ▼a0607
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360393▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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