# GDE EDR WORK PACKAGE PROPOSAL DESCRIPTION - PHASE 1

### Part I: Work Package Definition

+-------------------+--------------------------------------------------+
| **Work Package    |                                                  |
| categorization**  |                                                  |
+-------------------+--------------------------------------------------+
| **Technical       | CFS & Global                                     |
| Area**            |                                                  |
|                   |                                                  |
| **(EDR Org Chart  |                                                  |
| Level 2)**        |                                                  |
+-------------------+--------------------------------------------------+
| > **Technical     | Controls                                         |
| > Group**         |                                                  |
| >                 |                                                  |
| > **(EDR Org      |                                                  |
| > Chart Level     |                                                  |
| > 3)**            |                                                  |
+-------------------+--------------------------------------------------+
| **Technical       | 8                                                |
| Group\            |                                                  |
| Work Package      |                                                  |
| Number**          |                                                  |
+-------------------+--------------------------------------------------+
| **Categories\     | Engineering Design, Test Facility                |
| **(up to 3        |                                                  |
| keywords)         |                                                  |
+-------------------+--------------------------------------------------+
| **BCD, ACD, BOTH, | BCD                                              |
| or UNDEFINED**    |                                                  |
+-------------------+--------------------------------------------------+
| **Time frame for  | EDR                                              |
| major             |                                                  |
| deliverables**    |                                                  |
+-------------------+--------------------------------------------------+
| **Primary         |                                                  |
| Target**          |                                                  |
|                   |                                                  |
| (one keyword)     |                                                  |
+-------------------+--------------------------------------------------+
| **Local WP        |                                                  |
| dependencies**    |                                                  |
+-------------------+--------------------------------------------------+

+-------------------+-----------------------------------+-------------+
| **Work Package    |                                   |             |
| Details**         |                                   |             |
+-------------------+-----------------------------------+-------------+
| **Work Package    | *Timing*                          |             |
| Title**           |                                   |             |
+-------------------+-----------------------------------+-------------+
| **Short keyword   | *(For PMO use)*                   |             |
| title**           |                                   |             |
+-------------------+-----------------------------------+-------------+
| **Abstract**      | The ILC controls system needs R&D |             |
|                   | on distribution techniques for    |             |
|                   | the 1300 MHz timing distribution  |             |
|                   | system. The specified phase       |             |
|                   | stability requirement for timing  |             |
|                   | across the 15 km accelerator      |             |
|                   | complex pushes the                |             |
|                   | state-of-the-art in stable RF     |             |
|                   | signal distribution. The intent   |             |
|                   | is to build on recent systems at  |             |
|                   | SNS, DESY/TESLA and KEK and       |             |
|                   | ongoing work at SLAC and ANL.     |             |
+-------------------+-----------------------------------+-------------+
| **Major tasks and | 1.  Implement a prototype phase   |             |
| objectives**      |     reference stabilized fiber    |             |
|                   |     optic reference link, 15 km   |             |
|                   |     long operating at 1550 nm     |             |
|                   |     with 1.3 GHz modulation. This |             |
|                   |     would serve as a test bed for |             |
|                   |     different system control      |             |
|                   |     strategies and for testing    |             |
|                   |     and optimizing components     |             |
|                   |     such as phase shifters.       |             |
|                   |                                   |             |
|                   | 2.  The present design is based   |             |
|                   |     on the SNS local phase        |             |
|                   |     reference distribution. This  |             |
|                   |     scheme is very expensive at   |             |
|                   |     \~ \$800/meter. Lower cost    |             |
|                   |     alternatives would be         |             |
|                   |     investigated.                 |             |
|                   |                                   |             |
|                   | 3.  Investigate strategies for    |             |
|                   |     phase stabilizing long fiber  |             |
|                   |     optic links modulated at 1.3  |             |
|                   |     GHz. Possible options include |             |
|                   |     wavelength tuneable lasers,   |             |
|                   |     fiber frequency shifting with |             |
|                   |     CW modulation, pulsed RF      |             |
|                   |     modulation. Implement a test  |             |
|                   |     bed version for likely        |             |
|                   |     candidates.                   |             |
|                   |                                   |             |
|                   | 4.  Specify, develop and          |             |
|                   |     implement a prototype Event   |             |
|                   |     Generator and Event Receiver  |             |
|                   |     pair. Implementing this in    |             |
|                   |     parallel with the timing      |             |
|                   |     distribution studies can      |             |
|                   |     greatly simplify the event    |             |
|                   |     system with only a small      |             |
|                   |     impact on the timing system.  |             |
|                   |                                   |             |
|                   | 5.  Investigate feasibility for   |             |
|                   |     using a beam derived          |             |
|                   |     reference for locking a local |             |
|                   |     phase reference. Investigate  |             |
|                   |     HOM phase detector scheme.    |             |
|                   |                                   |             |
|                   | 6.  Prototype a two-channel phase |             |
|                   |     reference receiver with       |             |
|                   |     decision logic to auto switch |             |
|                   |     to back-up reference upon     |             |
|                   |     detected failure of primary   |             |
|                   |     reference.                    |             |
+-------------------+-----------------------------------+-------------+
| **Deliverables    |                                   |             |
| from Work         |                                   |             |
| Package**         |                                   |             |
+-------------------+-----------------------------------+-------------+
| **Major           |                                   |             |
| Milestones\       |                                   |             |
| (including key    |                                   |             |
| decision          |                                   |             |
| points)**         |                                   |             |
+-------------------+-----------------------------------+-------------+
| **Resources       |                                   |             |
| required**        |                                   |             |
|                   |                                   |             |
| **(eg expertise,  |                                   |             |
| facilities,       |                                   |             |
| leader, ...)**    |                                   |             |
+-------------------+-----------------------------------+-------------+

### Part II: Proposed Institute Involvement Levels

*The following information is to be considered [strictly
confidential]{.underline} until further notice.*

If there are currently no known or proposed resources for a given WP,
leave the tables blank.

+--------+------------------+--------------+------------+-----+-----+
| **O    |                  |              |            |     |     |
| ngoing |                  |              |            |     |     |
| or     |                  |              |            |     |     |
| newly  |                  |              |            |     |     |
| funded |                  |              |            |     |     |
| par    |                  |              |            |     |     |
| ticipa |                  |              |            |     |     |
| tion** |                  |              |            |     |     |
|        |                  |              |            |     |     |
| *(List |                  |              |            |     |     |
| all    |                  |              |            |     |     |
| know   |                  |              |            |     |     |
| inst   |                  |              |            |     |     |
| itutes |                  |              |            |     |     |
| who    |                  |              |            |     |     |
| are    |                  |              |            |     |     |
| cur    |                  |              |            |     |     |
| rently |                  |              |            |     |     |
| p      |                  |              |            |     |     |
| artici |                  |              |            |     |     |
| pating |                  |              |            |     |     |
| in     |                  |              |            |     |     |
| this   |                  |              |            |     |     |
| work)* |                  |              |            |     |     |
+--------+------------------+--------------+------------+-----+-----+
|        | **Institution**  | **Funding    | **Duration | *   |     |
|        |                  | Source**     | (be        | *Le |     |
|        |                  |              | gin/end)** | vel |     |
|        |                  |              |            | of  |     |
|        |                  |              |            | ef  |     |
|        |                  |              |            | for |     |
|        |                  |              |            | t** |     |
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|        |                  |              |            | FTE |     |
|        |                  |              |            | /   |     |
|        |                  |              |            | M&  |     |
|        |                  |              |            | S** |     |
+--------+------------------+--------------+------------+-----+-----+
| **     |                  |              |            |     |     |
| Coordi |                  |              |            |     |     |
| nating |                  |              |            |     |     |
| I      |                  |              |            |     |     |
| nstitu |                  |              |            |     |     |
| tion** |                  |              |            |     |     |
+--------+------------------+--------------+------------+-----+-----+
| **C    |                  |              |            |     |     |
| ollabo |                  |              |            |     |     |
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+--------+------------------+--------------+------------+-----+-----+
|        |                  |              |            |     |     |
+--------+------------------+--------------+------------+-----+-----+
|        |                  |              |            |     |     |
+--------+------------------+--------------+------------+-----+-----+
|        |                  |              |            |     |     |
+--------+------------------+--------------+------------+-----+-----+

  ----------------- -------------- ----------- --------------- --------- ---- ------------------------
  **Expressions of                                                            
  Interest (offered                                                           
  or submitted)**                                                             

  **Institution**   **Funding      **Funding   **Duration      **Level        **Comments\
                    available?**   Source**    (begin/end)**   of effort      (*e.g. proposed
                                                               FTE /          coordinating role*)**
                                                               M&S**          

                                                                              

                                                                              

                                                                              

                                                                              
  ----------------- -------------- ----------- --------------- --------- ---- ------------------------