ISTTOK Diagnostics - Histórico de revisões

Ist181549: /* Tomography cameras */

2019-09-16T13:34:47Z

‎Tomography cameras

Ist181820: /* Tomography cameras */

2019-07-22T00:11:06Z

‎Tomography cameras

Ist181820: /* Tomography cameras */

2018-09-09T22:31:06Z

‎Tomography cameras

Ist181820: /* Interferometer */

2018-09-09T22:30:14Z

‎Interferometer

Ist181820: /* Interferometer */

2018-09-09T22:29:36Z

‎Interferometer

Ist181820: /* Interferometer */

2018-09-09T22:29:20Z

‎Interferometer

Ist181820: /* Tomography cameras */

2018-09-09T22:27:05Z

‎Tomography cameras

Ist181820: /* Tomography cameras */

2018-09-09T22:25:04Z

‎Tomography cameras

Ist181820: /* Tomography cameras */

2018-09-09T22:19:23Z

‎Tomography cameras

Ist181820: /* Tomography cameras */

2018-09-09T22:16:18Z

‎Tomography cameras

@@ Linha 84: / Linha 84: @@
 |}
 </figtable>
 ==Vessel temperature monitoring==
 ==Pressure gauges==

@@ Linha 68: / Linha 68: @@
 | 148
 | 39.8
-| 1.10
+| 1.55
 | 109
 | 9

@@ Linha 29: / Linha 29: @@
 </figure>
-The tomography setup at ISTTOK is composed of 3 cameras: top, outer and bottom. Each one has a 22 element photodiode-array (PD-array), as shown in figure <xr id="fig:camera"/>, but only the 16 central elements are used.
+The tomography setup at ISTTOK is composed of 3 cameras: top, outer and bottom. Each one has a 22 element photodiode-array (PD-array), as shown in <xr id="fig:camera"/>, but only the 16 central elements are used.
 The photodiode-arrays and associated electronics are placed inside a brass cylinder which is covered on top with a copper-plated lid with a 0.8mm pinhole. This lid is shielded by ~3 mm thick piece of lead, to protect the device from the plasma and x-ray caused by runaway electrons. The inside of the cylinder and lid is coated with a layer of colloidal graphite to make it black and non-reflective.
 The three cameras are very similar in design and, consequently, have very similar signal gains, this isn't however enough to discard the need of a suitable calibration.
-The devices are placed around the vessel as shown in figure <xr id="fig:cross"/>. The exact geometry of each one is explicit in table <xr id="tab:geom"/>, where positions are measured from the center of the vessel. For the bottom camera, the flange is different and has a small 4,5mm spacer under the brass cylinder.
+The devices are placed around the vessel as shown in <xr id="fig:cross"/>. The exact geometry of each one is explicit in <xr id="tab:geom"/>, where positions are measured from the center of the vessel. For the bottom camera, the flange is different and has a small 4,5mm spacer under the brass cylinder.
 Note that:

@@ Linha 8: / Linha 8: @@
 </figure>
-The ISTTOK interferometer, represented in figure <xr id="fig:interf"/>, is based on the heterodyne detection principle with quadrature detection for an absolute phase determination and has only one vertical line of sight that crosses the plasma in the radial center. The interferometer uses a central frequency of 100 GHz, crossing the plasma central cord. It can be used to measure densities up to 1.24 x 10^20 m-3. The signal from the RF oscillator and the same signal after crossing the plasma are then mixed with the local oscillator frequency (99.15GHz), resulting in an interference frequency of 850 MHz. Although more complex, this method with a intermediate frequency generation has the advantage of reducing the frequency to be acquired by the data acquisition system and improves the sensibility of the system.
+The ISTTOK interferometer, represented in <xr id="fig:interf"/>, is based on the heterodyne detection principle with quadrature detection for an absolute phase determination and has only one vertical line of sight that crosses the plasma in the radial center. The interferometer uses a central frequency of 100 GHz, crossing the plasma central cord. It can be used to measure densities up to 1.24 x 10^20 m-3. The signal from the RF oscillator and the same signal after crossing the plasma are then mixed with the local oscillator frequency (99.15GHz), resulting in an interference frequency of 850 MHz. Although more complex, this method with a intermediate frequency generation has the advantage of reducing the frequency to be acquired by the data acquisition system and improves the sensibility of the system.
 After the phase unwrapping one can retrieve the average plasma density across this cord.

@@ Linha 8: / Linha 8: @@
 </figure>
-The ISTTOK interferometer, represented in figure <xr id="fig:inter"/>, is based on the heterodyne detection principle with quadrature detection for an absolute phase determination and has only one vertical line of sight that crosses the plasma in the radial center. The interferometer uses a central frequency of 100 GHz, crossing the plasma central cord. It can be used to measure densities up to 1.24 x 10^20 m-3. The signal from the RF oscillator and the same signal after crossing the plasma are then mixed with the local oscillator frequency (99.15GHz), resulting in an interference frequency of 850 MHz. Although more complex, this method with a intermediate frequency generation has the advantage of reducing the frequency to be acquired by the data acquisition system and improves the sensibility of the system.
+The ISTTOK interferometer, represented in figure <xr id="fig:interf"/>, is based on the heterodyne detection principle with quadrature detection for an absolute phase determination and has only one vertical line of sight that crosses the plasma in the radial center. The interferometer uses a central frequency of 100 GHz, crossing the plasma central cord. It can be used to measure densities up to 1.24 x 10^20 m-3. The signal from the RF oscillator and the same signal after crossing the plasma are then mixed with the local oscillator frequency (99.15GHz), resulting in an interference frequency of 850 MHz. Although more complex, this method with a intermediate frequency generation has the advantage of reducing the frequency to be acquired by the data acquisition system and improves the sensibility of the system.
 After the phase unwrapping one can retrieve the average plasma density across this cord.

@@ Linha 4: / Linha 4: @@
 ==Spectroscopy==
 ==Interferometer==
-[[File:Interferometer_schematic.png||thumb|Fig. 1 - ISTTOK interferometer based on the heterodyne detection principle. |right|border|480px]]
+<figure id="fig:interf">
-The ISTTOK interferometer is based on the heterodyne detection principle with quadrature detection for an absolute phase determination and has only one vertical line of sight that crosses the plasma in the radial center. The interferometer uses a central frequency of 100 GHz, crossing the plasma central cord. It can be used to measure densities up to 1.24 x 10^20 m-3. The signal from the RF oscillator and the same signal after crossing the plasma are then mixed with the local oscillator frequency (99.15GHz), resulting in an interference frequency of 850 MHz. Although more complex, this method with a intermediate frequency generation has the advantage of reducing the frequency to be acquired by the data acquisition system and improves the sensibility of the system.
+[[File:Interferometer_schematic.png||thumb|right|border|480px| <caption> ISTTOK interferometer based on the heterodyne detection principle. </caption>]]
 After the phase unwrapping one can retrieve the average plasma density across this cord.

@@ Linha 23: / Linha 23: @@
 <figure id="fig:camera">
-[[File:cross.jpg||thumb|right|border|<caption> Camera used for tomography. </caption>]]
+[[File:Look.jpg||thumb|right|border|<caption> Camera used for tomography. </caption>]]
 </figure>
-The tomography setup at ISTTOK is composed of 3 cameras: top, outer and bottom. Each one has a 22 element photodiode-array (PD-array), as shown in figure <xr id="camera"/>, but only the 16 central elements are used.
+The tomography setup at ISTTOK is composed of 3 cameras: top, outer and bottom. Each one has a 22 element photodiode-array (PD-array), as shown in figure <xr id="fig:camera"/>, but only the 16 central elements are used.
 The photodiode-arrays and associated electronics are placed inside a brass cylinder which is covered on top with a copper-plated lid with a 0.8mm pinhole. This lid is shielded by ~3 mm thick piece of lead, to protect the device from the plasma and x-ray caused by runaway electrons. The inside of the cylinder and lid is coated with a layer of colloidal graphite to make it black and non-reflective.

@@ Linha 22: / Linha 22: @@
 outside of the sample. This is particularly useful in Fusion because it allows the reconstruction of the plasma emissivity profile .
-[[File:look.jpg||thumb|Fig. 2 - Camera used for tomography. |right|border]]
+<figure id="fig:camera">
-The tomography setup at ISTTOK is composed of 3 cameras: top, outer and bottom. Each one has a 22 element photodiode-array (PD-array), as shown in figure 2, but only the 16 central elements are used.
+[[File:cross.jpg||thumb|right|border|<caption> Camera used for tomography. </caption>]]
 The photodiode-arrays and associated electronics are placed inside a brass cylinder which is covered on top with a copper-plated lid with a 0.8mm pinhole. This lid is shielded by ~3 mm thick piece of lead, to protect the device from the plasma and x-ray caused by runaway electrons. The inside of the cylinder and lid is coated with a layer of colloidal graphite to make it black and non-reflective.
 The three cameras are very similar in design and, consequently, have very similar signal gains, this isn't however enough to discard the need of a suitable calibration.
-The devices are placed around the vessel as shown in figure 3. The exact geometry of each one is explicit in table 1 where positions are measured from the center of the vessel. For the bottom camera, the flange is different and has a small 4,5mm spacer under the brass cylinder.
+The devices are placed around the vessel as shown in figure <xr id="fig:cross"/>. The exact geometry of each one is explicit in table <xr id="tab:geom"/>, where positions are measured from the center of the vessel. For the bottom camera, the flange is different and has a small 4,5mm spacer under the brass cylinder.
 Note that:
@@ Linha 35: / Linha 38: @@
 PD-array position = Pinhole position + Pinhole to PD-array distance
-[[File:cross.jpg||thumb|Fig. 3 - Cross section of the vessel showing the ports used in tomography. |center|border]]
+<figure id="fig:cross">
 {| class="wikitable"
 ! (mm)
@@ Linha 74: / Linha 80: @@
 | 37.7
 |}
+</figtable>
 ==Vessel temperature monitoring==
 ==Pressure gauges==