A Novel Rectilinear Negative Carbon Ion Beam Source for Large-Area Amorphous Diamond Like Carbon Coatings

1995 ◽  
Vol 396 ◽  
Author(s):  
M.H. Sohn ◽  
YO. Ahn ◽  
Y.W. Ko ◽  
Y. Park ◽  
S.I. Kim
Keyword(s):  
Ion Beam ◽  
High Vacuum ◽  
Ion Beams ◽  
Ion Source ◽  
Hydrogen Gas ◽  
Diamond Like Carbon ◽  
Large Area ◽  
Beam Source ◽  
Carbon Ion ◽  
Carbon Ion Beam

AbstractA novel rectilinear negative carbon ion beam source for large-area coatings has been developed, based on SKION's Solid State Ion Beam Technology. The negative carbon ion beam is effectively produced by a primary cesium ion bombardment and the secondary negative carbon ion yield has been observed to be about 0.5. The ion source produces a negative carbon ion current density of 0.25 mA/cm2 at the extraction voltage of 4 kV. The ion beam energy can be independently controlled from 0 eV to 300 eV. Due to the rectilinear geometry for the production of ion beams, the scale-up of the ion beam in length direction can be easily obtained with no limit. Furthermore, the ion source uses no gas discharge to generate ion beams and does not use any hydrogen gas. The ion source can be operated in a high vacuum (<10-7 Torr), and the cesium vapors are filtered and recirculated. The ion source produces ultra-hard (50 GPa), atomically smooth (< 1 nm Ra), and hydrogen-free amorphous diamond-like-carbon (DLC) films over large areas.

Large Area Surface Treatment by Ion Beam Technology

1996 ◽  
Vol 438 ◽  
Author(s):  
R. L. C. Wu ◽  
W. Lanter
Keyword(s):  
Ion Beam ◽  
High Vacuum ◽  
Polycrystalline Diamond ◽  
Carbon Films ◽  
Ultra High Vacuum ◽  
Diamond Like Carbon ◽  
Chemical Compositions ◽  
Rf Power ◽  
Large Area ◽  
Ion Energy

AbstractAn ultra high vacuum ion beam system, consisting of a 20 cm diameter Rf excilted (13.56 MHz) ion gun and a four-axis substrate scanner, has been used to modify large surfaces (up to 1000 cm2) of various materials, including; infrared windows, silicon nitride, polycrystalline diamond, 304 and 316 stainless steels, 440C and M50 steels, aluminum alloys, and polycarbonates; by depositing different chemical compositions of diamond-like carbon films. The influences of ion energy, Rf power, gas composition (H2/CH4 , Ar/CH4 and O2/CH4/H2), on the diamond-like carbon characteristics has been studied. Particular attention was focused on adhesion, environmental effects, IR(3–12 μm) transmission, coefficient of friction, and wear factors under spacelike environments of diamond-like carbon films on various substrates. A quadrupole mass spectrometer was utilized to monitor the ion beam composition for quality control and process optimization.

scholarly journals Carbon Ion Therapy Inhibits Esophageal Squamous Cell Carcinoma Metastasis by Upregulating STAT3 Through the JAK2/STAT3 Signaling Pathway

2020 ◽  
Vol 8 ◽  
Author(s):  
Hongtao Luo ◽  
Zhen Yang ◽  
Qiuning Zhang ◽  
Lihua Shao ◽  
Shihong Wei ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Signaling Pathway ◽  
Ion Beam ◽  
Ion Beams ◽  
Dependent Manner ◽  
Carbon Ion ◽  
Stat3 Signaling ◽  
Stat3 Signaling Pathway ◽  
Carbon Ion Beam ◽  
Dose Dependent

Radiation therapy is an important component of the comprehensive treatment of esophageal cancer. However, conventional radiation resistance is one of the main reasons for treatment failure. The superiority of heavy ion radiation in physics and biology has been increasingly highlighted in radiation therapy research. The Janus Kinase 2/Signal Transducer and Activator of Transcription 3 (JAK2/STAT3) pathway plays an important role in the occurrence, development and metastasis of esophageal squamous cell carcinoma (ESCC) and is related to the development of resistance to ionizing radiation in ESCC. Therefore, the aim of the present study was to investigate the relationship between carbon ion inhibition of the proliferation and metastasis of esophageal carcinoma cells and the JAK2/STAT3 signaling pathway. The results demonstrated that carbon ion beams significantly reduced cell viability and stimulated apoptosis in human ESCC cells in a dose-dependent manner. In addition, carbon ion beams induced G2/M phase cell cycle arrest in ESCC cells and inhibited tumor metastasis in a dose-dependent manner. Additionally, poorly differentiated KYSE150 cells were more sensitive to the same carbon ion beam dose than moderately differentiated ECA109 cells. Carbon ion beam exposure regulated the relative expression of metastasis-related molecules at the transcriptional and translational levels in ESCC cells. Carbon ion beams also regulated CDH1 and MMP2 downstream of the STAT3 pathway and inhibited ESCC cell metastasis, which activated the STAT3 signaling pathway. This study confirmed the inhibition of cell proliferation and the metastatic effect of carbon ion beam therapy in ESCC cells.

Tribological properties of diamond-like carbon films deposited by negative carbon ion beam

1998 ◽  
Vol 16 (6) ◽  
pp. 3554-3558 ◽  
Author(s):  
M. H. Sohn ◽  
Y. O. Ahn ◽  
Y. W. Ko ◽  
S. R. Hah ◽  
T. E. Fischer ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Ion Beam ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Carbon Ion ◽  
Carbon Ion Beam

scholarly journals Particle Beam Therapy for Cancer of the Skull Base, Nasal Cavity, and Paranasal Sinus

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Nobuyoshi Fukumitsu
Keyword(s):  
Nasal Cavity ◽  
Skull Base ◽  
Paranasal Sinus ◽  
Ion Beam ◽  
Particle Beam ◽  
Ion Beams ◽  
Carbon Ion ◽  
Carbon Ion Beam ◽  
Future Direction ◽  
Particle Beam Therapy

Particle beam therapy has been rapidly developed in these several decades. Proton and carbon ion beams are most frequently used in particle beam therapy. Proton and carbon ion beam radiotherapy have physical and biological advantage to the conventional photon radiotherapy. Cancers of the skull base, nasal cavity, and paranasal sinus are rare; however these diseases can receive the benefits of particle beam radiotherapy. This paper describes the clinical review of the cancer of the skull base, nasal cavity, and paranasal sinus treated with proton and carbon ion beams, adding some information of feature and future direction of proton and carbon ion beam radiotherapy.

Design of a Compact Negative Metal Ion Beam Source for Surface Studies

1995 ◽  
Vol 396 ◽  
Author(s):  
Y. Park ◽  
Y.W. Ko ◽  
M.H. Sohn ◽  
S.I. Kim
Keyword(s):  
Solid State ◽  
Metal Ion ◽  
Beam Energy ◽  
Ion Beam ◽  
High Vacuum ◽  
Ion Source ◽  
Ultra High Vacuum ◽  
Negative Ion ◽  
Beam Diameter ◽  
Beam Source

AbstractA compact negative metal ion beam source for direct low energy metal ion beam depositions studies in ultra high vacuum (UHV) environment, has been developed. The ion source is based on SKION's Solid State Ion Beam Technology. The secondary negative metal ion beam is effectively produced by primary cesium positive ion bombardment (negative ion yield varies from 0.1-0.5 for carbon). The beam diameter is in the range of 0.2∼3.0 cm depending on the focusing and ion beam energy. The ion source produces negative ion currents of about 0.8 mA/cm2. The energy spread of the ion beam is less then ±5% of the ion beam energy. The energy of negative metal ion beam can be independently controlled in the range of 10-300 eV. Due to the complete solid state ion technology , the source can be operated while maintaining chamber pressures of less then 10-10 Torr.

Carbon transport in Si(001) and nucleation of diamond-like carbon layers during mass selected carbon ion beam deposition

1998 ◽  
Vol 7 (1) ◽  
pp. 15-22 ◽  
Author(s):  
S. Christiansen ◽  
M. Albrecht ◽  
G. Frank ◽  
H.P. Strunk ◽  
C. Ronning ◽  
...  
Keyword(s):  
Ion Beam ◽  
Diamond Like Carbon ◽  
Carbon Ion ◽  
Ion Beam Deposition ◽  
Carbon Ion Beam ◽  
Beam Deposition ◽  
Carbon Transport

Advanced monochrome gray-scale TFT-LCD using diamond-like-carbon/ion-beam alignment technology

2004 ◽  
Vol 12 (4) ◽  
pp. 435 ◽  
Author(s):  
Yoshiki Nakagawa ◽  
Hiroyuki Satoh ◽  
Toshifumi Nakamura ◽  
Kenji Okajima ◽  
Sueharu Maenosono ◽  
...  
Keyword(s):  
Ion Beam ◽  
Diamond Like Carbon ◽  
Gray Scale ◽  
Carbon Ion ◽  
Carbon Ion Beam

Energy distribution of negative carbon ion beam extracted from a plasma-sputter-type negative ion source

2000 ◽  
Vol 71 (2) ◽  
pp. 1122-1124 ◽  
Author(s):  
H. Oomori ◽  
T. Kasuya ◽  
M. Wada ◽  
Y. Horino ◽  
N. Tsubouchi
Keyword(s):  
Energy Distribution ◽  
Ion Beam ◽  
Ion Source ◽  
Negative Ion ◽  
Carbon Ion ◽  
Carbon Ion Beam
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