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--- accelerator:energy_frontier:start [2020/04/09 17:17] – [Description] shiltsev
+++ accelerator:energy_frontier:start [2020/09/09 10:27] (current) – [Description] markapalmer
@@ Line 1: / Line 1: @@
-====== AF4: Multi-TeV Coliders ======
+====== AF4: Multi-TeV Colliders ======
 Co-Conveners:
-Alexander Valishev (Fermilab)
+Alexander Valishev (Fermilab),
-Mark Palmer (BNL)
+Mark Palmer (BNL),
-Nadia Pastrone (INFN/Torino)
+Nadia Pastrone (INFN/Torino) ,
+Jingyu Tang (IHEP)
 ===== Description=====
-For the past 50 years Particle colliders have been at the forefront of scientific discoveries in high energy physics. This Group is to discuss novel concepts and possibilities for the highest beam energy colliders, to evaluate their respective potentials and prospects for further significant breakthroughs in the field.  In particular, the questions and topics we address include:
+For the past 50 years Particle Colliders have been at the forefront of scientific discoveries in high energy physics. This working group will focus on potential machine routes, R&D requirements, and possible timelines to deliver colliders that could operate in the 1-100 TeV center-of-mass energy range (or beyond).  The topics that we will address include:
-  - Question/Topic1 (HL-LHC and upgrades, LHeC)
+  * Connections between the physics needs and accelerator types
-  - Question/Topic 2 (FCC, SppC)
+  * Detailed machine requirements to achieve the community's physics goals
-  - Question/Topic 3 (Muon Colliders)
+  * Exploration of the various types of colliders that may play a future role at the energy frontier:
-  - Question/Topic 3 (Synergies - with EIC, advanced schemes, etc)
+        * Very high energy proton-proton machines
+        * Multi-TeV electron-positron machines
+        * Muon colliders
+        * Other very high energy machine concepts (e.g. gamma-gamma, high energy electron-ion, and others)
+  * Common issues at the very high energy scale such as energy efficiency and cost
+The first two topics above, will be explored in conjunction with the relevant Snowmass 2021 physics working groups.  For each of the machine concepts, we are soliciting a set of Letters of Intent from the accelerator community that individually address:
+  - The machine concept
+  - The R&D needs to deliver a potential future capability
+  - The connections of the technology to existing facilities (e.g. to provide potential facility construction and/or R&D pathways)
+A more detailed request for these LOIs will be circulated shortly after the APS April Meeting 2020.  A schedule for both joint meetings and AF4 discussions will also be developed at that point.
 Many relevant publications can be found at:  [[https://www.nature.com/collections/cajfiddcee]] , [[https://www.nature.com/collections/heigibehfc]], [[https://arxiv.org/abs/1910.11775]]
+===== Submitted LOI =====
+Here is the list of submitted LOIs to this  topic.
+ First index before "/"  corresponds to the primary frontier used for the submission.
+ {{url>https://www.snowmass21.org/docs/files/list.php?frontier=AF4  noborder 95%,600px}}