1 / 10

ANNEX

ANNEX. Sandblasted Center Conductor of a Cavity Input Coupler. Before Sandblasting. After Sandblasting. R a = 1.651 µm R z = 9.46 µm. R a = 0.624 µm R z = 3.82 µm. R a = 2.164 µm R z = 11.9 µm. R a = 0.380 µm R z = 3.00 µm. R a = 1.994 µm R z = 11.6 µm. R a = 0.338 µm

helena
Télécharger la présentation

ANNEX

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ANNEX

  2. Sandblasted Center Conductor of a Cavity Input Coupler Before Sandblasting After Sandblasting Ra = 1.651 µm Rz = 9.46 µm Ra = 0.624 µm Rz = 3.82 µm Ra = 2.164 µm Rz = 11.9 µm Ra = 0.380 µm Rz = 3.00 µm Ra = 1.994 µm Rz = 11.6 µm Ra = 0.338 µm Rz = 2.05 µm Ra: Mittenrauwert, average surface roughness Rz: Rautiefe, rouhgness depth WP 1.04, Michael Ebert

  3. Coupler Conditioning Two Hours Samples of Traditional Conditioning Method New Conditioning Method RF-Power [kW], Klystron-HV [kV] Klystron Drive Power [W], Cavity-Vacuum [mbar] WP 1.04, Michael Ebert

  4. Coupler Conditioning Arc-Detector vs Vacuum-Interock Coupler Forward Power FM Frequency Deviation: 100 kHz Modulation Frequency: 400 Hz Ârc-Detector Signal 1*10-6 mbar Vacuum Pressure 3*10-8 mbar 163 ms WP 1.04, Michael Ebert

  5. RF Control Loop & LLRF In order to run the klystron over the full output power range close to saturation and at highest efficiency a Klystron Working Point Controller (KWPC) was developed. The KWPC is a PXI-PC with ADC inputs for measuring the required klystron output power Pin, the present klystron output power Pout and the present drive power Pdrv. DAC outputs are available for setting the correct drive, beam current and cathode voltage via the voltage controlled attenuator, anode power supply and cathode voltage supply. The optimum values of klystron voltage, current and drive for any klystron output power are stored in a look-up table of the KWPC. The table values are optimized during klystron operation by an additional algorithm which changes successive and marginal klystron voltage, current and drive for best efficiency. In order to suppress amplitude and phase modulation noise at the klystron rf output a fast I/Q rf-loop is foreseen. The expected noise suppression is 60dB@300Hz, 40dB@3kHz, 20dB@30kHz, 6dB@300kHz. For compensating beam loading and temperature influence on phase and amplitude of the cavity voltage a second control loop is foreseen. The hardware of both loops is identical in order to keep the number of different components minimal. • Status: • Function of KWPC was proven using a single klystron transmitter and a standard desktop PC. • Prototypes of the essential rf-loop components have been built and tested. • Function of the fast I/Q rf-loop was proven at a single klystron transmitter. • Outlook: • KWPC algorithm must be extended for a two-klystron transmitter and adapted to the ELWIS-Hardware • Series rf-loop components must be built. • Function of the rf-loops must be proved together with the KWPC. • Test is scheduled for February 2007 WP 1.04, Michael Ebert

  6. Waveguide Shutters WP 1.04, Michael Ebert

  7. Typical Structure of our RF-Systems 12 Cavities Load 2000 wires Circulator 14 Electronic Racks >200 Plugs Klystron ~80 Crates HV Cabinet signal converters, comparators, control electronics, displays, tell-tales,… 60 terminal strips 250 relays & power contactors jumble of cables & plugs WP 1.04, Michael Ebert

  8. WiringConventional vs. ELWIS sensor electronic board terminal strip Conventional electronic board terminal strip actor terminal strips crate board ELWIS device server Rack controller signal cond. ADC sensor device server router controller signal cond. DAC actor Rack WP 1.04, Michael Ebert

  9. Available Inputs/Outputs Provided in/out channels of one ELWIS-Module • 12 digital inputs (24V, optical coupled) • 4 digital outputs (60V, 3A optical coupled) • 8 digital outputs (optionally 60V, 3A optical coupled or power contactors) • 2 arc detector inputs (optionally rf-rfl. detector) • 4 analog outputs (-10V…+10V, dc…30Hz galvanic isolated) • 10 temperature sensor inputs (PT-100) • 6 analog inputs (-10V…+10V, dc…30Hz galvanic isolated) • 8 analog inputs (optionally 500MHz, 30dBm or -1V…+1V, dc…3MHz) WP 1.04, Michael Ebert

  10. What does ELWIS mean? All-in-one device suitable for every purpose Acronym: Eier legende Woll-Milch-Sau egg-laying wool-milk-sow ELWomIS originally ELWOMIS WP 1.04, Michael Ebert

More Related