 Modulator and klystron assembly. Blue hat is lead shielding of klystron collector. |  Cooling water machine to seperately cool the klystron tube, collector and magnet. |
 19"-inch cabinet with (top-to-bottom) three power supplies for klystron magnet, Ion getter pump power supply, PLL Synchronizer and RF amplifier . |
Friday, December 22, 2006
Current status just before Christmas
A small overview of current status of the assembly of the electron accelerator setup.
Test assembly of RF waveguide section - 22th of December
Today I have finished the test assembly of the waveguide section between the klystron tube and the RF input coupler at the cavity side.
Below you see a small impression.
Below you see a small impression.
 Total waveguide section |  Circulator directly behind klystron tube |
 Bridging section |  Section to Cavity with bi-directional coupler |
 RF input coupler with RF window |  4-port Circulator |
Wednesday, December 20, 2006
Modulator test 28th of November 2006
On this day we tested the modulator for the first time. The test was to check the pulses produced by the modulator without driving the klystron tube with RF power.
From the BNC output connectors the current and voltage pulses were obtained and recorded by an oscilloscope:
Note: The tension pulses are multiplied by a factor 2, because they were recorded using 50Ω termination, which causes the measured tension to be half of the proper value.
From the BNC output connectors the current and voltage pulses were obtained and recorded by an oscilloscope:
Note: The tension pulses are multiplied by a factor 2, because they were recorded using 50Ω termination, which causes the measured tension to be half of the proper value.
Final installation of Modulator and klystron at correct height – 3 November 2006
Some pictures of the final installation.
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Assembly of Modulator and klystron into frame – 30 October 2006
Some pictures of the installation of the modulator and klystron into the frame.
Note: The output of the klystron tube was to low. Therefore, we had to lift the modulator by almost 100 mm using cilinders.
 Modulator |  Klystron Magnet |
 Klystron tube |
Note: The output of the klystron tube was to low. Therefore, we had to lift the modulator by almost 100 mm using cilinders.
Installation of waveguide frame – 24 October 2006
In the picture you can see the frame that will support the RF waveguide section.
Frame for modulator and waveguide section.
Frame for modulator and waveguide section.
Final assembly of Accelerator Cavity – 20 September 2006
This day we went to Eindhoven University of Technology to do the final assembly of the accelerator cavity and take it to Delft.
 Middle part |  RF input coupler part |
 Full assembly of copper parts. |  Copper cavity fixed into stainless steel container. |
Electrical validation of Accelerator Cavity – 25 August 2006
This day we went to Eindhoven University of Technology to perform electrical measurements on the accelerator cavity after the final turning. The measurements are summarized in the following report: ElectricalValidationCavity.pdf
 Resonance frequency measured by Network Analyzer. |  Beat ball measurement setup to measure the on-axis electric field strength. |
Installation of optical table for electron accelerator – 8 August 2006
In August the optical table on which the electron accelerator will be constructed, is installed.
 Positioning of optical tables. |  Optical table assembly positioned in the accelerator room. |
 Viewed from the other side. |
Shipment of Modulator – 7 Aug 2006
The shipment of the Modulator and klystron has arrived in Delft.
 Modulator |  Klystron |
 Klystron Magnet |
Test of soldering at workshop of Eindhoven University of Technology – 11 Jul 2006
The cooling water channels and Thermocoax Heating elements have been soldered. Before the final turning will start, this soldering is tested on leakages.
 Copper cavity parts. |  RF-input coupler side with Thermocoax heating element. |
 Assembly of middle part with cathode part including cooling water channels and Thermocoax heating element. |
Tuesday, December 19, 2006
Visit to ScandiNova in Uppsala Sweden – 7 Jul 2006
Beginning of July 2006 we have visited ScandiNova in Uppsala for the Factory Acceptance Test of the Modulator.
Left-to-right: W. Knulst (TU Delft), M. Vermeulen (TU Delft), H. Jansson (ScandiNova), M. Lindholm (ScandiNova)Completion of Accelerator Room in DelftChemTech building – 3 March 2006
The accelerator room is delivered beginning of March 2006.
Below you see two pictures taken at that time.
Below you see two pictures taken at that time.
 Entrance to the accelerator room. |  Accelerator Room. |
Start of Weblog
Today I will start the weblog of the picosecond pulsed, 4.5-MeV electron accelerator.
The construction of the electron accelerator started already by the end of the summer 2006. So, the first posts on the weblog are describing event or milestones that have been achieved during the last year.
From now on, my intension is to post a few messages per month on the current status.
The construction of the electron accelerator started already by the end of the summer 2006. So, the first posts on the weblog are describing event or milestones that have been achieved during the last year.
From now on, my intension is to post a few messages per month on the current status.
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