# Presentation: 633948

## ALS Top-Off Upgrade 

_**ALS Top-Off Upgrade **_
**Booster RF Systems**
**11/22-23/2004**

**Ken Baptiste**
**ALS RF Group**

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## RF System Modes

- _Energy__	__Injection Rate__	__Mode__	__Cavity Power_
- 1.5 GeV	Ramped, 1 Hz	Operation	15 kW peak
- 1.9 GeV	Ramped, 0.5 Hz	Operation	66 kW peak
- N.A.	Ramped/Continuous	Test/Maint	70 kW CW

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## RF System Parameters for 1.9GeV

- Frequency (MHz)						499.64
- Harmonic number						125
- Peak effective voltagea (kV)				813
- Beam current, multibunch mode (mA)			4
- Synchrotron radiation loss, dipoles (kW)			5
- Total effective shunt impedance, ZT2 (M)		5
- Fundamental-mode cavity dissipation (kW)		66
- Waveguide and other lossesb (kW)			11
- Total RF power (kW)					77
- Total RF power installed (kW)				80

- a based on 66kW dissipation
- b estimated to be  0.3dB transmission loss & 11% RL for =2

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## Systems Effected by the Upgrade

-  Final Amplifier/Transmitter
-  HVPS
-  Cavity Window
-  RF Feeder/Transmission Line
-  Controls & Interlock System
-  Utilities
-  Spares

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## Existing Final Amplifier/Transmitter

-  UHF TV Xmtr manufactured by Townsend Broadcast (out of business)
-  15kW Aural, 30kW peak sync Vision
-  EEV Klystron K3371BCD
-  15 years of service

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## Proposed Final Amplifier/Transmitter

-  UHF TV Xmtr manufactured by Thales Broadcast & Multimedia
-  80kW CW
-  Thales IOT TH-793, (Inductive Output Tube)
-  Embedded PLC, System PLC for intrfce to control sys.
-  Other Vendors: Acrodyne Ind., Axcera,

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## Final Amplifier/Transmitter

| Parameter | E2V K3773 Klystron | Thales TH 793      IOT | E2V D2130       IOT | Thales IOX Series Xmtr |
| --- | --- | --- | --- | --- |
| Output Power (kW) | 75 | 80 | 85 | 80 |
| Gain (dB) | 34 - 42 | 22.7 | 20.5 – 23 | 22.7 |
| Beam PS | 25kV@5.8A | 36kV@3.3A | 35kV@3.1A | 36kV@3.3A |
| Fil. PS Upgrade | Yes | Yes | Yes | Included |
| Focus PS Upgrade | No | Yes | Yes | Included |
| Grid PS Upgrade | N.A. | Yes | Yes | Included |
| Crowbar Upgrade | N.A. | Yes | Yes | Included |
| Drive Amp Upgrade | N.A. | Yes | Yes | Included |
| Fits in Current Cabinet | Yes | Yes | Yes | Fits in current site |
| Energy Costs Increase vs. Existing Xmtr (6720 Hr, $0.12/kWH) | $108.2k | $65.0k | $55.8k | $73.1k * |
| Transmitter | Retro-fit tube | Retro-fit tube | Retro-fit tube | New |

- * Includes transmitter control power not just HVPS

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## HVPS Type

|  | Amplifier Type |  | Location |  |
| --- | --- | --- | --- | --- |
| HVPS Type | Klystron | IOT | Inside B6 | Outside B6 |
| Oil Cooled- Cost/Del | No bid requested | Del. 4 – 6 mo | No* | Yes, $$ |
| Air cooled- Cost/Del | Del. 3 - 4 mo | Del. 3 – 4 mo | Yes | Yes, $$ |

- *Per Gary Piermattei, EH&S-Fire Protection

- HVPS Simplified Block Diagram

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## HVPS Location

- Existing HVPS Location

- New HVPS Location

- Temp Install new system to allow for acceptance test, control system programming, and commissioning.

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## RF Cavity Power Coupler Window

_**Current Design:**_
-  2 in SRRF operating at 43kW CW
-  1 repaired fully tested spare
-  Manufacture, TiN coating & test to 66KW CW at LBNL
**Manufacture 2 more windows of this type for Booster RF**

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## Titanium Nitride Coating

- TiN Coating System

- Coating thickness determined by Rutherford Back Scattering (RBS) performed on site at LBNL.
- This sample measured 15 angstroms. Our target range is 10 – 20 angstroms.

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## Power Test/Condition Window

- B27 Cavity Teststand, 66kW @ 500MHz
-  Identical cavity to Booster and Storage Ring

-  Power Conditioned in 24 Hrs over a 4 day period.
-  21 Rev Pwr Trips
-  5 Vac Trips
-  Window Temp ran < 80C

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## RF Feeder/Transmission Line

-  All new components are catalog items.
-  Existing system is comprised of 3 1/8” EIA coax line, 3” air dielectric flexible coax line, 6 1/8” 75kW circulator, and WR1800.

- New system:

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## Controls & Interlock System

-  PLC’s to be rated Safety Integrity Level (SIL) 3
-  Leverage existing ModBusTCP interfaces
-  Replaces 60% of the installed BRF ILC’s
-  Re-use existing Low Level RF Controller until replaced with FPGA based controller
-  System Controller and Embedded PLC’s delivered programmed for xmtr control
-  Plan to install transmitter temporarily on ALS floor for pre-shutdown commissioning and controls programming.

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## Utilities

**Capacity exists for both the 480VAC and LCW requirement increases**

- in series

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## Spares

- IOT Tube
- Class A,A/B Driver Amplifier
- Cavity Window
- Other miscellaneous parts

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## Summary

-  Final Amplifier/Transmitter – Install IOT based xmtr, pre-shutdown commission and control system program, more efficient, less repair time.
-  HVPS – Install in new location, no impact to current operations. Air cooled (minimal fire protection issues).
-  Cavity Window – Manufacture 2 new windows based on existing design, Titanium Nitride coat and test in-house.
-  RF Feeder/Transmission Line – Replace coax line with 6 1/8”, install higher power loads. All items are readily available commercial items.
-  Controls & Interlock System – Replace 60% of existing BRF ILC’s with SIL 3 rated PLC system, new Xmtr control system.
-  Utilities – There is ample capacity to cover both the 480 VAC and LCW requirement increases.
-  Spares – IOT, Drive Amp, Window to ensure operations after the upgrade.

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